Question

let f(x) = 13x + 7 and g(x) = x^2 -3, find f( +g)(x)

Answer 1

$\mleft(f+g\mright)\mleft(x\mright)=f\mleft(x\mright)+g\mleft(x\mright)$$(f+g)(x)=(13x+7)+(x^2-3)=x^2+13x+4$