f******y
发帖数: 2971 | 1 suppose f(x) is a C^2 function,so we can write
f(x+a)=f(x)+f'(x)a+(1/2)f"(x)a^2+r(x,a);
how to estimate r(x,a) here? | f******y
发帖数: 2971 | 2 btw,someone said that,
r(x,a)<=a^2 M(a),with M(a)->0,if a->0.
Is this right?how to explain it?
Thanks,highhand
【在 f******y 的大作中提到】
: suppose f(x) is a C^2 function,so we can write
: f(x+a)=f(x)+f'(x)a+(1/2)f"(x)a^2+r(x,a);
: how to estimate r(x,a) here?
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