數學數學數學``{急}

1.　2^3x3^2 = 2x(2^2)x(3^2) = 2x(3x2)^2 = 2 x 6^2 = 2 x 36 = 72

2.　(-a^2)^3 = (-1)^3 x (a^2)^3 = - a^(2x3) = -a^6

3.　(a^2)^3 = a^(2x3) = a^6

4.　a^10‧a^2/a^5‧a^6 = a^[(10+2)-(5+6)] = a^1 = a

化簡下列各數式。

(a)﹝x^3/y^2﹞^4‧(x^2y)^3
= x^[(3)(4)+(2)(3)] y^[(-2)(4)+3] = x^18/ y^5
(b)a^2xa^3xb^4/(a^2b)^3
= a^[2+3-(2x3)] b^(4-3) = a^(-1) b^1 = b/a
(c)　(-4a)^3/(-2ab)^2
= (-4)^3 a^(3-2)/[(-2)^2 b^2]
= -64a / (4b^2)
= -16a / b^2