展开 y(xsin(x)+cos(x))

解答

展开

y (x sin (x) + cos (x))

y x sin (x) + y cos (x)

求解步骤

y (x sin (x) + cos (x))

使用分配律:

a (b + c) = ab + a c

y (x sin (x) + cos (x)) = y x sin (x) + y cos (x)

= y x sin (x) + y cos (x)

e x p an d - \frac{1}{2} (e^{- t} - 1)

e x p an d \frac{2 ( x ^{3} - 3 x ^{2} - 3 x - 1 )}{x ^{3} ( x + 1 ) ^{3}}

e x p an d \frac{1}{( 12965 e - 3 \cdot s + 1 ) ^{3}}

e x p an d \frac{( 1 - x ^{2} ) ^{2}}{2}

e x p an d (e^{x} + e^{- x}) (e^{x} + e^{- x})