1.

If f:R-R is defined by f(x) = x2-3x+2forall XER, then find fof.​

Answer»

We have , f(X) = x2 - 3x + 2

f(f(x)) = f(x2 - 3x + 2)

= (x2 - 3x + 2)2 -3(x2-3x+2)+2

= X4 + 9x2 + 4 - 6x3 - 12x + 4x2 - 3X2 + 9x - 6 + 2

= x4 - 6x3 + 10x2 - 3x

f(f(x)) = x4 - 6x3 + 10x2 - 3x



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