《同底数幂的除法》解答题
1.计算:
22(1)(a2b)3?(a2b); (2)(?)6?()3?(?3?10)0;
33(3)(102)3?105?(105)3; (4)(a3)2?(a4)2?(?a2)4; (5)(x4)3?(x3)2?(x2)4; (6)a2b?a2b;
????4?102?3??3??1?(7)?5?5?5??5; (8)????????
?2??2??3?2?20?3?1(9)x7?x3?x2; (10)x4?x3??x2[来
2.地球的体积约为1.1?1012立方米,月球的体积约为2.2?1010立方米,则地球的体积是月球体积的多少倍.
3.计算:
(1)?2?3?8?1???1?6??2?????32?3??2?65?1??????70; (2)a2?a3?a3?2?27?2?????????a332;
2(3)?x?y????x?y???x?y?; (4)?a?2b????a?2b???a?2b?;
3111(5)(?)3?()0?()6; (6)(xn)m?1?(xn?1)m?2;
333(
7
)
(x?y)5?(?x?y)3?(x?y)2; (8)
(a?2b)m?1?(a?2b)m?3?(a?2b)2;
11(9)0.25?()?2?(3.14??)0?()?1??2.
234.求下列各式中的x: (1)2x?1; (2)2.5?10x?250000; (3)128x?8?211. 645.解不列不等式:
(1)(?2)3(3x?1)?(?4)2(1?2x); (2)a2(x?1)?a3(1?x)(a??2).
6.(1)已知:xm?5,xn?3,求x2m?3n的值
(2)已知:2m?3,32n?6,求23m?10n.
参考答案:
8; (3)10?4; (4)a10; (5)x14; (6)1.(1)a4b2; (2)27a4b2;(7)2125; (8)?43; (9)1; (10)?x12. 2.50.
3.(1)-1; (2)a8; (3)??x?y?5; (4)??a?2b?2;27;
(6)xm?3m?2; (7)?x4?2x2y2?y4; (8)a2?4ab?4b2;4.(1)x?1128;(2)x?5;(3)x?2. 5.(1)x??1a7; (2)x??1a?1.
6.(1)2527; (2)34.
5)
9) (- (1]
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