Let f(c)=x^(2)+4x-2 and g(x)=2f(x+1)-f(x). (a) Find g(x).?

2017-09-17 9:46 am

回答 (1)

2017-09-17 10:02 am
✔ 最佳答案
Let f(x)=x^2+4x-2 and g(x)=2f(x+1)-f(x),Find g(x)?
Sol
f(x+1)=(x+1)^2+4(x+1)-2
=(x^2+2x+1)+(4x+4)-2
=x^2+6x+3
g(x)=2(x^2+6x+3)-(x^2+4x-2)
=x^2+8x+8


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