Question
If f(x)= x 1+x^2 , then (fof of) (x) is
BITSAT
Mathematics
Functions
2023
BITSAT 2023 (Memory Based Paper 1)
BITSAT Mathematics Question (2023) — Solution
Options
- A. 3 x 1+x^2
- B. x 1+3 x^2
- C. 3 x 1-x^2
- D. None of these
Answer
B. x 1+3 x^2
Step-by-step solution
f(x)= x 1+x^2 fof= x 1+x^2 1+ x^2 1+x^2 = x 2 x^2+1 fofof = x 2 x^2+1 1+ x^2 2 x^2+1 = x 1+3 x^2
Related: Mathematics — Functions · All PYQ Banks