Let f(x) = 5x +3 and g(x) =   Find (i) (f+g)(x)    (ii) (f-g

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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.
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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)
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#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)
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#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 :


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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()
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#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


D= R, space space space space space space space space space space space space space straight D subscript straight g space equals space left curly bracket straight x element of straight R comma space straight x greater or equal than space 1 right curly bracket space equals space left square bracket 1 comma space infinity right square bracket

space space space space space space space space space straight D subscript straight f plus straight g equals space straight D subscript straight f intersection straight D subscript straight g space equals space left square bracket 1 comma space infinity right square bracket

"<pre

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space space space space space space space space space space space space space space straight D subscript straight f divided by straight g end subscript space equals space straight D subscript straight f intersection straight D subscript straight g minus left curly bracket straight x colon straight g left parenthesis straight x right parenthesis equals 0 right curly bracket equals left square bracket 1 comma infinity right square bracket comma space minus left curly bracket 1 right curly bracket equals left parenthesis 1 comma infinity right parenthesis

space space space space space space space space space space space space space space space space straight D subscript straight g divided by straight f end subscript space equals space straight D subscript straight f intersection straight D subscript straight g minus left curly bracket straight x colon straight g left parenthesis straight x right parenthesis equals 0 right curly bracket equals left square bracket 1 comma infinity right square bracket minus open curly brackets fraction numerator negative 3 over denominator 5 end fraction close curly brackets equals left square bracket 1 comma infinity right square bracket

∴    (i)  (f + g) (x) =f(x) + g(x) = (5x + 3) + space space space space space square root of straight x minus 1 end root comma space straight x greater or equal than 1

      (ii) (f - g) (x) = f(x) - g(x) = (5x + 3) - space space space space square root of straight x minus 1 end root comma space straight x greater or equal than 1

(iii) (fg)(x) = f(x) -g(x) = (5x+3)space space space space square root of straight x minus 1 end root comma space straight x greater or equal than 1

(iv)   space space space space space space space space space space space space straight f over straight g left parenthesis straight x right parenthesis space equals space fraction numerator straight f left parenthesis straight x right parenthesis over denominator straight g left parenthesis straight x right parenthesis end fraction space equals space fraction numerator 5 straight x plus 3 over denominator square root of straight x minus 1 end root comma space straight x space greater than 1 end fraction

(v)          space space space space space space space space space open parentheses straight g over straight f close parentheses left parenthesis straight x right parenthesis equals fraction numerator square root of straight x minus 1 end root over denominator 5 straight x plus 3 end fraction comma space straight x greater or equal than 1
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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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