The simplest value of  is from Quantitative Aptitude Algebra

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 Multiple Choice QuestionsMultiple Choice Questions

41.

If straight x open parentheses 3 minus 2 over straight x close parentheses space equals space 3 over straight x comma space then the value of straight x squared plus 1 over straight x squared will be

  • 3 1 over 9
  • 3 2 over 9
  • 2 1 over 9
  • 2 1 over 9
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42.

If fraction numerator straight a over denominator straight q minus straight r end fraction equals space fraction numerator straight b over denominator straight r minus straight p end fraction equals fraction numerator straight c over denominator straight p minus straight q end fraction, then the value of pa + qb + rc is

  • 0

  • 1

  • 2

  • 2

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43.

The simplest value of fraction numerator 3 square root of 8 minus 2 square root of 12 plus square root of 20 over denominator 3 square root of 18 minus 2 square root of 27 plus square root of 45 end fraction space is

  • 3 over 2
  • 2 over 3
  • 1 third
  • 1 third


B.

2 over 3
fraction numerator 3 square root of 8 minus 2 square root of 12 plus square root of 20 over denominator 3 square root of 18 minus 2 square root of 27 plus square root of 45 end fraction space equals space fraction numerator 3 cross times 2 square root of 2 minus 2 cross times 2 square root of 3 plus 2 square root of 5 over denominator 3 cross times 3 square root of 2 minus 2 cross times 3 square root of 3 plus 3 square root of 5 end fraction
                                equals fraction numerator 2 open square brackets 3 square root of 2 minus 2 square root of 3 plus square root of 5 close square brackets over denominator 3 left square bracket 3 square root of 2 minus 2 square root of 3 plus square root of 5 right square bracket end fraction space equals space 2 over 3
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44.

If open parentheses straight a plus 1 over straight a close parentheses squared space equals space 3, then the value of straight a cubed plus 1 over straight a cubed is

  • 0

  • 3 open parentheses straight a plus 1 over straight a close parentheses
  • 3 open parentheses straight a squared plus 1 over straight a squared close parentheses
  • 3 open parentheses straight a squared plus 1 over straight a squared close parentheses
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45.

If fraction numerator straight a squared plus straight b squared over denominator straight c squared end fraction space equals space fraction numerator straight b squared plus straight c squared over denominator straight a squared end fraction space equals fraction numerator straight c squared plus straight a squared over denominator straight b squared end fraction space equals space 1 over straight k comma space left parenthesis straight k not equal to 0 right parenthesis space then space straight k space equals space ?

  • 2

  • 1

155 Views

46.

If 2 straight x plus fraction numerator 2 over denominator 9 straight x end fraction space equals 4 comma then the value of 27 straight x cubed plus fraction numerator 1 over denominator 27 straight x cubed end fraction

  • 180

  • 198

  • 234

  • 234

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47.

If straight x squared plus 1 over straight x squared equals space space 2 comma space then the value of straight x minus 1 over straight x is

  • -2

  • 0

  • 1

  • 1

93 Views

48.

If pq left parenthesis straight p plus straight q right parenthesis space equals space 1 comma spacethen the value of fraction numerator 1 over denominator straight p cubed straight q cubed end fraction minus straight p cubed minus straight q cubed is equal to

  • 1

  • 2

  • 3

  • 3

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49.

If straight x equals space square root of 2 plus 1 comma then the value of straight x to the power of 4 minus 1 over straight x to the power of 4 is

  • 8 square root of 2
  • 18 square root of 2
  • 6 square root of 2
  • 6 square root of 2
91 Views

50.

If 9 straight x squared plus 16 straight y squared space equals space 60 and 3 straight x plus 4 straight y space equals space 6 comma then the value of xy is

  • -1

  • 1

  • -2

  • -2

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