Q. 7

LetThen write the value of α satisfying f(x)) = x for all
x ≠ - 1.

Answer :



x2 (a+1)+x(1- a2)=0

x2 (a+1)+x(1-a)(1+a)=0

(a+1)( x2+x(1-a))=0


Therefore, a=-1

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