Maths-
General
Easy

Question

Which of the following is an equivalent form of cube root of straight f to the power of 6 straight a end exponent space straight k squared end root, where f > 0 and k > 0 ?

  1. straight f to the power of fraction numerator 1 over denominator 3 straight a space end fraction end exponent straight k to the power of negative 1 end exponent
  2. straight f to the power of fraction numerator 1 over denominator 2 straight a space end fraction end exponent straight k to the power of 3 over 2 end exponent
  3. straight f to the power of 3 straight a end exponent space straight k to the power of negative 1 end exponent
  4. straight f to the power of 2 straight a end exponent space straight k to the power of 2 over 3 end exponent

The correct answer is: straight f to the power of 2 straight a end exponent space straight k to the power of 2 over 3 end exponent


    HINT: Rewrite the given expression and then get the equivalent form.
    Complete step by step solution:
    Given cube root of straight f to the power of 6 straight a end exponent space straight k squared end root
    This can be written as, open parentheses straight f to the power of 6 straight a end exponent space straight k squared close parentheses space to the power of fraction numerator 1 over denominator 3 space end fraction end exponent equals space straight f to the power of fraction numerator 6 straight a over denominator 3 end fraction end exponent space cross times space straight k to the power of 2 over 3 end exponent
    On simplification, we get it as straight f to the power of 2 straight a end exponent space cross times space straight k to the power of 2 over 3 end exponent
    Hence option D is the answer

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