求導y'=6(sinx+xcosx)
在π/2處y'=6
切線方程y-3π=6(x-π/2)
即y=6x
find an equation of the tangent line to the curve y=6xsinx at the point(π/2,3π)求y
find an equation of the tangent line to the curve y=6xsinx at the point(π/2,3π)求y
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