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(1)(ax2)(a2x)=(2)()(x2y)2=-x5y3(3)(-3x3y)•(-x4)•(-y3)=(4)-6a2b•(12abc)2=(5)15xny•2xn-1•yn-1=(6)(1.2×103)(2.5×1011)(4&time

题目详情
(1)(ax2)(a2x)=___
(2)(___)(x2y)2=-x5y3
(3)(-3x3y)•(-x4)•(-y3)=___
(4)-6a2b•(
1
2
abc)2=___
(5)15xny•2xn-1•yn-1=___
(6)(1.2×103)(2.5×1011)(4×109)=___.
▼优质解答
答案和解析
(1)原式=a1+2x2+1
=a3x3
(2)原式=x5y3÷(x2y)2
=x5-4y3-2
=xy.
(3)原式=3x3+4y•(-y3
=-3x3+4y3+1
=-3x7y4
(4)原式=-6×
1
2
×a2+2b1+2c2
=-3a4b3c2
(5)原式=15×2×xn-1+n•yn-1+1
=30x2n-1•yn
(6)原式=(1.2×103)(2.5×103)(2.5×4×109
=(1.2×2.5×103)(2.5×4×109
=3×1013