已知f(x)=x(x-1)(x-2)(x-3)……(x-100),则f'(0)=?

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已知f(x)=x(x-1)(x-2)(x-3)……(x-100),则f'(0)=?
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已知f(x)=x(x-1)(x-2)(x-3)……(x-100),则f'(0)=?
已知f(x)=x(x-1)(x-2)(x-3)……(x-100),则f'(0)=?

已知f(x)=x(x-1)(x-2)(x-3)……(x-100),则f'(0)=?
f'(x)=x.*(x-1)(x-2)(x-3)……(x-100)+x(x-1)'*(x-2)(x-3)……(x-100)+……+x(x-1)(x-2)(x-3)……(x-100)‘
=(x-1)(x-2)(x-3)……(x-100)+x(x-2)(x-3)……(x-100)+……+x(x-1)(x-2)(x-3)……(x-99)
除了第一项,后面都有x,则后面的都是0
所以f'(0)=(-1)(-2)……(-100)=100!

已知f(x)=x(x-1)(x-2)(x-3)……(x-100),
f'(x)=(x-1)(x-2)(x-3)……(x-100)+x(x-2)(x-3)……(x-100)+x(x-1)(x-3)……(x-100)+……+x(x-1)(x-2)(x-3)……(x-99)
f'(0)=(0-1)(0-2)(0-3)……(0-100)=100!

f(0)=0*(-1)*(-2)*......*(-100)=0