be a function from R into Detemine the range of f. from Math

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 Multiple Choice QuestionsShort Answer Type

61.

Find the domain of the function space space space space space space space space space straight f left parenthesis straight x right parenthesis space equals space fraction numerator straight x squared plus 3 straight x plus 5 over denominator straight x squared plus straight x minus 6 end fraction

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62. space space space space space space space space Let space straight f space equals space open curly brackets open parentheses straight x comma fraction numerator straight x squared over denominator 1 plus straight x squared end fraction close parentheses space colon space straight x space bold R close curly brackets  be a function from R into Detemine the range of f.


space space space space space space space space space space space space straight f left parenthesis straight x right parenthesis space equals space fraction numerator straight x squared over denominator 1 plus straight x squared end fraction

For the range Rf, put space space space straight y space equals fraction numerator straight x squared over denominator 1 plus straight x squared end fraction

space space space space space space space space space space space space rightwards double arrow space space space space space space space space space space space space space space space straight y space plus space yx squared equals straight x squared left parenthesis 1 minus straight y right parenthesis equals straight y rightwards double arrow straight x squared equals fraction numerator straight y over denominator 1 minus straight y end fraction rightwards double arrow straight x equals plus-or-minus square root of fraction numerator straight y over denominator 1 minus straight y end fraction end root

For x to be defined y and 1-y must either be both positive or both negative.

When               straight y less or equal than 0 space and space 1 minus straight y greater than 0

rightwards double arrow  space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space straight y greater or equal than 0 space and space straight y minus 1 less than 0 rightwards double arrow straight y greater or equal than 0 space and space straight y less than 1 rightwards double arrow 0 less or equal than straight y less than 1

Also, when  straight y less or equal than 0 space and space 1 minus straight y space less than 0

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#1 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php(56): mkdir('/home/config_ad...', 493)
#2 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/FolderTreeStorageAndCache.class.php(110): com_wiris_util_sys_Store->mkdirs()
#3 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/RenderImpl.class.php(231): com_wiris_plugin_impl_FolderTreeStorageAndCache->codeDigest('mml=<math xmlns...')
#4 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/TextServiceImpl.class.php(59): com_wiris_plugin_impl_RenderImpl->computeDigest(NULL, Array)
#5 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/service.php(19): com_wiris_plugin_impl_TextServiceImpl->service('mathml2accessib...', Array)
#6 {main}</pre>

whcih is not possible

∴       space space space space space space space space space 0 less or equal than straight y less than 1

Hence, the range of the function is R = [0, 1]
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63.  Find the range of the following functions :


(i)  f(x) = x-4x + 6,  space space space straight x element of straight R       <pre>uncaught exception: <b>mkdir(): Permission denied (errno: 2) in /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php at line #56mkdir(): Permission denied</b><br /><br />in file: /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php line 56<br />#0 [internal function]: _hx_error_handler(2, 'mkdir(): Permis...', '/home/config_ad...', 56, Array)
#1 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php(56): mkdir('/home/config_ad...', 493)
#2 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/FolderTreeStorageAndCache.class.php(110): com_wiris_util_sys_Store->mkdirs()
#3 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/RenderImpl.class.php(231): com_wiris_plugin_impl_FolderTreeStorageAndCache->codeDigest('mml=<math xmlns...')
#4 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/TextServiceImpl.class.php(59): com_wiris_plugin_impl_RenderImpl->computeDigest(NULL, Array)
#5 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/service.php(19): com_wiris_plugin_impl_TextServiceImpl->service('mathml2accessib...', Array)
#6 {main}</pre>
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64.  Find the range of the following functions :


space space space space space space space space space space space space space space space space space space space space space space space space space straight f left parenthesis straight x right parenthesis space equals space 1 half straight x comma space space straight x element of straight R  
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65.

If the following f : Rrightwards arrow f  is defined by :


<pre>uncaught exception: <b>mkdir(): Permission denied (errno: 2) in /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php at line #56mkdir(): Permission denied</b><br /><br />in file: /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php line 56<br />#0 [internal function]: _hx_error_handler(2, 'mkdir(): Permis...', '/home/config_ad...', 56, Array)
#1 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/util/sys/Store.class.php(56): mkdir('/home/config_ad...', 493)
#2 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/FolderTreeStorageAndCache.class.php(110): com_wiris_util_sys_Store->mkdirs()
#3 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/RenderImpl.class.php(231): com_wiris_plugin_impl_FolderTreeStorageAndCache->codeDigest('mml=<math xmlns...')
#4 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/lib/com/wiris/plugin/impl/TextServiceImpl.class.php(59): com_wiris_plugin_impl_RenderImpl->computeDigest(NULL, Array)
#5 /home/config_admin/public/felixventures.in/public/application/css/plugins/tiny_mce_wiris/integration/service.php(19): com_wiris_plugin_impl_TextServiceImpl->service('mathml2accessib...', Array)
#6 {main}</pre>

(i) f(2)      (ii)  f(4)         (iii) f(-1)     (iv) f (-3)

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66.

Let f(x) = 5x +3 and g(x) = space space space space space space space square root of straight x minus 1 end root comma space straight x element of straight R comma space straight x greater or equal than 1.  Find (i) (f+g)(x)    (ii) (f-g)(x)  (iii)

(fg) (x)  space space space space space space space space space space space space space space left parenthesis iv right parenthesis space space space open parentheses straight f over straight g close parentheses left parenthesis straight x right parenthesis space space space space space space space space space space space space space space left parenthesis straight v right parenthesis space open parentheses straight g over straight f close parentheses left parenthesis straight x right parenthesis

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67.

Let f and g be two functions defined by f(x) = space space space space space space space space square root of straight x minus 1 end root space and space straight g left parenthesis straight x right parenthesis space equals space square root of 4 minus straight x squared end root

find (i) f +g (ii)  g + f (iii) f - g  (iv) g  - f    (v) gg    (vi)  gf

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68.

The relation f is defined by      space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space straight f left parenthesis straight x right parenthesis equals space open curly brackets table attributes columnalign left columnspacing 1.4ex end attributes row cell straight x cubed comma end cell cell 0 less or equal than straight x less or equal than 3 end cell row cell 9 straight x comma end cell cell 3 less or equal than straight x less or equal than 7 end cell end table close

and relation g is defined by space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space straight g left parenthesis straight x right parenthesis equals space open curly brackets table attributes columnalign left columnspacing 1.4ex end attributes row cell straight x cubed comma end cell cell 0 less or equal than straight x less or equal than 3 end cell row cell 9 straight x comma end cell cell 3 less or equal than straight x less or equal than 7 end cell end table close

Explain, why f is a function and g is not.

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 Multiple Choice QuestionsMultiple Choice Questions

69.

If the function g(x) =open curly brackets table attributes columnalign left end attributes row cell straight k square root of straight x plus 1 end root comma space space 0 space less or equal than straight x space less or equal than 3 end cell row cell mx plus 2 space comma space 3 space less than straight x less or equal than 5 end cell end table close is differntiable, then the value of k+m is

  • 2

  • 16/5

  • 10/3

  • 10/3

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70.

If a ε R and the equation - 3(x-[x]2 + 2(x-[x] +a2 = 0(where,[x] denotes the greatest integer ≤ x) has no  integral solution, then all possible value of  lie in the interval

  • (-1,0) ∪ (0,1)

  • (1,2)

  • (-2,-1)

  • (-∞,-2) ∪ (2, ∞)

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