SAT1000 - P158

Algebra Level pending

There exist function f(x)f(x) such that xR\forall x \in \mathbb R, the property follows:

A. f(sin2x)=sinxA.\ f(\sin 2x)=\sin x

B. f(sin2x)=x2+xB.\ f(\sin 2x)=x^2+x

C. f(x2+1)=x+1C.\ f(x^2+1)=|x+1|

D. f(x2+2x)=x+1D.\ f(x^2+2x)=|x+1|


Have a look at my problem set: SAT 1000 problems

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