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JEE MATHEMATICS MCQ: FUNCTIONS

1 Easy

1 of 1

Application +4 | -1

If

\phi(x)=x^2+1

and

\psi(x)=3^x

, then

\phi\{\psi(x)\}

and

\psi\{\phi(x)\}=

View answer and explanation

Correct option: C

3^{2 x}+1,3^{x^2+1}

Option C (

3^{2x} + 1, 3^{x^2+1}

) is correct because substituting

\psi(x)

into

\phi(x)

gives

3^{2x} + 1

and substituting

\phi(x)

into

\psi(x)

gives

3^{x^2+1}

.

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