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y=(x+1)(x+2)(x+3)的导数?
人气:131 ℃ 时间:2019-07-22 02:33:01
解答
y=(x+1)(x+2)(x+3)
=(x+1)'(x+2)(x+3)+(x+1)(x+2)'(x+3)+(x+1)(x+2)(x+3)'
=(x+2)(x+3)+(x+1)(x+3)+(x+1)(x+2)
=x²+5x+6+x²+4x+3+x²+3x+2
=3x²+12x+11
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