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  4. If the function f(x)=(ax+b/cx+d)(c≠ 0) coincides with its inverse, then

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

Relations and Functions - Part 2

Solution:

Correct answer is (b) a + d = 0