WBJEE · Maths · Functions
Let be defined by . Let be given as . Then, the sum of all the values of for which is equal to
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
fx=y=x-2x-3 ∴x=3y-2y-1 ∴f-1x=3x-2x-1 & g(x)=y=2 x-3 ∴x=y+32 ∴g-1x=x+32 ∵f-1x+g-1x=132 ∴ x2-5x+6= ∴ sum of roots x1+x2=5
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