8.2幂的乘方与积的乘方
1.想一想:下面的计算对不对?如果不对,请指出:
(1) ; (2) ; (3)
2. 填空题:
(1)=__________; (2)=________;
(3)=________; (4)=_________;
(5)=_________; (6)=__________;
(7)=_________; (8)________;
(9)_________; (10)_________.
3.填空:⑴ a12 =(a3)( ) =(a2)( )=a3 a( )=()3 =( )4
⑵ 32﹒9m =3( ) ⑶ y3n =3, y9n =
⑷ (a2)m+1 = ⑸ {(a-b)3 } 2=(b-a )( )
4. 计算:
(1) (2)
(3)
5. 等于 ( )
A. B. C. D.
6.下列各式计算正确的是( )
(A) (B)
(C) (D)
2
7. (-a)a= ( )
A.-a B.a C.-a D.a
8.观察下列单项式:a,-2a2,4a3,-8a4,16a5,…,按此规律第n个单项式是______. (n是正整数)
答案
1.(1)×,a6(2)× a7 (3)√
2.(1)106(2)-b10 (3)n6(4)n6(5)-p4n-2(6)a30(7)(a+b)6(8)2a5(9)a10(10)a25
3.(1)4,6,9,a4,a3(3)32m+2(3)y9n=(y3n)3=33=27(4)a2m+2(5)6
4. (1) (2)
(3)
5.B
6.C
7.B
8. (-1)n+1nan
2