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A function f from integers to integers i...

A function `f` from integers to integers is defined as `f(x)={n+3, n in od d n/2,n in e v e n` suppose `k in ` odd and `f(f(f(k)))=27` . Then the sum of digits of `k` is__________

A

3

B

6

C

9

D

12

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The correct Answer is:
B
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ARIHANT MATHS ENGLISH-FUNCTIONS-Exercise (Single Option Correct Type Questions)
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  14. If f(x)=x^(3)+3x^(2)+4x+asinx+bcosx, forall x in R is a one-one fuctio...

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  15. If two roots of the equation (p-1)(x^2 +x +1)^2 -(p+1)(x^4+x^2+1)=0 ar...

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  16. Let f(x)=sin^(-1)2x + cos^(-1)2x + sec^(-1)2x. Then the sum of the max...

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  17. The complete set of values of a for which the function f(x)=tan^(-1)(x...

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