作者kentarosu (肯泰罗)
看板trans_math
标题[积分] 绝对值
时间Sat Jun 5 09:34:39 2010
设f:R→R,且f(x)= ∣x∣ sin(x)
a)求f'(x)
2π
b>求 ∫ ∣x∣ sin(x) dx
-π
fend the area of the region bounded by the garph of f(x)=sinx
and g(x)=cosx for 0≦x≦π
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