Question

急问高二数学题

应选哪个？为什么？详细解答好吗？谢谢

Answer 1

f(x) at x0
f(x0+y) - f(x0) = ay +by^2
f'(x) = lim(y->0) (f(x+y) -f(x))/ y
f'(x0)=lim(y->0) (f(x0+y) -f(x0))/ y
=lim(y->0) (a+by)
=a
Ans: C: f'(x0) =a