展开 (sin(3-x))/((x-3)× (x^2+1))

解答

展开

\frac{sin ( 3 - x )}{( x - 3 ) \cdot ( x ^{2} + 1 )}

\frac{sin ( 3 - x )}{x ^{3} + x - 3 x ^{2} - 3}

求解步骤

\frac{sin ( 3 - x )}{( x - 3 ) ( x ^{2} + 1 )}

乘开

(x - 3) (x^{2} + 1) : x^{3} + x - 3 x^{2} - 3

= \frac{sin ( 3 - x )}{x ^{3} + x - 3 x ^{2} - 3}

e x p an d (x - y^{2}) d x + 2 x y d y

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

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

e x p an d \frac{4 - x ^{2}}{( 4 + x ^{2} ) ^{2}}

e x p an d e^{- x} + (2 x + 3) e^{3 x} + 2 cos (3 x)