3除以3x+2求导
设 f(x)=3/(3x+2),则
f'(x)=[3/(3x+2)²]*(3x+2)'
=9/(3x+2)²
据题设→f(x)=3/(3x+2),f′(x)=3[(-1)/(3x+2)²](3)=-9/(3x+2)²。
y=3/(3x+2)
y=1/(x+2/3)
y'=-1/(x+2/3)²
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设 f(x)=3/(3x+2),则
f'(x)=[3/(3x+2)²]*(3x+2)'
=9/(3x+2)²
据题设→f(x)=3/(3x+2),f′(x)=3[(-1)/(3x+2)²](3)=-9/(3x+2)²。
y=3/(3x+2)
y=1/(x+2/3)
y'=-1/(x+2/3)²