If f(x)=4x+1 and g(x)=x^2-3x+1,then (f+g)(-2)=?
问题描述:
If f(x)=4x+1 and g(x)=x^2-3x+1,then (f+g)(-2)=?
答
f(x)=4x+1,g(x)=x^2-3x+1
f(x)+g(x)=x^2+x+2
f(-2)+g(-2)=4-2+2=4(f+g)是把他们加起来么?是的