Question

If the function $f(x)=\frac{ax+b}{cx+d}(c\ne 0)$ coincides with its inverse, then

• A. a - d = 0
• B. a + d = 0
• C. a - b = 0
• D. a - c = 0

Answer 1

Answer: (B)

Correct answer is (b) a + d = 0