已知函数f(x)=x
3+ax
2+bx(a,b∈R)图象过点P(1,2),且f(x)在点P处的切线与直线y=8x+1平行.
(1)求a,b的值
(2)若
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在[-1,1]上恒成立,求正数m的取值范围.
考点分析:
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