Question

6) Dada a função f(x) = x3 – 8x, encontre f(-2) e f(1):

Answer 1

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$f(x)=x^3-8x \\ \\ f(-2)=(-2)^3-8(-2) \\ \\ f(-2)=-8+16 \\ \\ f(-2)=+8$


$f(x)=x^2-8x \\ \\ f(1)=(1)^2-8(1) \\ \\ f(1)=1-8 \\ \\ f(1)=-7$