(2分之一乘以ab^2c)^2乘以(-3三分一abc)^3乘以(12a^2 乘以b)2(x-y)^3乘以{-2分之一乘以(y-x)^3}^2(-2x^4)^4乘以y^3+2x^10(-2x^2乘以y)^3+2x^乘以5(x^4)^3(3y)^3
问题描述:
(2分之一乘以ab^2c)^2乘以(-3三分一abc)^3乘以(12a^2 乘以b)
2(x-y)^3乘以{-2分之一乘以(y-x)^3}^2
(-2x^4)^4乘以y^3+2x^10(-2x^2乘以y)^3+2x^乘以5(x^4)^3(3y)^3
答
(1/2*ab^2c)^2*(-1/3abc)^3*(12a²*b)
=a²b^4c²/4×(-a³b³c³/27)×12a²b
=-a^7b^8c^5/9
2(x-y)^3*{-1/2*(y-x)^3}^2
=(x-y)³×(x-y)^6/4
=(x-y)^9/4
(-2x^4)^4*y^3+2x^10(-2x^2*y)^3+2x^ 4 *5(x^4)^3(3y)^3
=16x^16y³-16x^16y³+54x^16y³
=54x^16y³
答
1.设小麦X (1-15%)x=6630 x=8840 2.设A为X 3(X+10)+3X=60 X=5 20-5=15 3. 设原速度为x 5x=(5-1)(3+x) x=12 5*12=60 4.
答
(2分之一乘以ab^2c)^2乘以(-3三分一abc)^3乘以(12a^2 乘以b)
=a²b^4c²/4×(-a³b³c³/27)×12a²b
=-a^7b^8c^5/9
2(x-y)^3乘以{-2分之一乘以(y-x)^3}^2
=(x-y)³×(x-y)^6/4
=(x-y)^9/4
(-2x^4)^4乘以y^3+2x^10(-2x^2乘以y)^3+2x^ 4 乘以5(x^4)^3(3y)^3
=16x^16y³-16x^16y³+54x^16y³
=54x^16y³