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JEE MATHEMATICS MCQ: FUNCTIONS

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Application +4 | -1

If

f: R \rightarrow R

and

g: R \rightarrow R

defined by

f(x)=2 x+3

and

g(x)=x^2+7

, then the value of

x

for which

f(g(x))=25

is

View answer and explanation

Correct option: B

\pm 2

Option B (

\pm 2

) is correct because it is the solution to the equation f(g(x)) = 25.

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f\left( x \right) = x - \left[ x \right]

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f(x)=x^4

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