展开 (1,e^t,tln(t))(3t+1)

解答

展开

(1, e^{t}, t ln (t)) (3 t + 1)

3 t (1,, e^{t} t ln (t)) + 1 \cdot (1,, e^{t} t ln (t))

求解步骤

(1, e^{t}, t ln (t)) (3 t + 1)

= (1,, e^{t} t ln (t)) (3 t + 1)

使用分配律:

a (b + c) = ab + a c

a = (1, e^{t}, t ln (t)), b = 3 t, c = 1

= (1, e^{t}, t ln (t)) \cdot 3 t + (1, e^{t}, t ln (t)) \cdot 1

= 3 t (1,, e^{t} t ln (t)) + 1 \cdot (1,, e^{t} t ln (t))

e x p an d \frac{( x ^{2} + 2 x - 6 ) ^{2}}{4}

e x p an d P (- 5, 4, 2) e Q (3, - 3, 9)

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

e x p an d 4 cos (2 (x - \frac{π}{3})) + 1

e x p an d (1 - u - v, 1 - u, u) \cdot (1, 1, 1)