Question:
If f(x)=x√(1+x²), then (f f)(x) is
If f(x)=x√(1+x²), then (f f)(x) is
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Be careful while simplifying composite functions.
Updated On: Mar 18, 2026
- 3x√(1+x²)
- x√(1+3x²)
- 3x√(1-x²)
- None of these
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: f(f(x))=x√(1+x²)√(1+(x²)/(1+x²))
Step 2: =x√(1+2x²)
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