8.1幂的运算提高练习题(最新整理)

1、例题：幂的运算提高练习题4例 已知3x(xn + 5) = 3xn+1 + 45 ，求 x 的值例 若na，求代数式（x n y)(xn-1 y 2 )(xn-2 y 3 )l(x 2 yn-1 )(xyn ) 的值例 已知xy，求4 x 32 y 的值例 已知25m 2 10n = 57 24 ，求 m、n例 已知 a x = 5, a x+ y = 25, 求ax + a y 的值例 若 xm+2n = 16, xn = 2, 求xm+n 的值例 已知10a = 3,10b = 5,10c = 7, 试把写成底数是的幂的形式例 比较下列一组数的大小8131，2741，961例 如果 a 2

2、 + a = 0(a 0), 求a 2005 + a 2004 + 12的值例已知9n+1 - 32n = 72 ，求 n 的值练习：计算（- 2）100 +（- 2）99 所得的结果是（） 299 299当 n 是正整数时，下列等式成立的有（）（ ） a 2m = (am )2（ ） a 2m = (a 2 )m（ ） a 2m = (-am )2（ ）a 2m = (-a 2 )m个个个个计算： (-a 2 )3 + (-a3 )2 若2m = 5 ， 2n = 6 ，则2m+2n 下列运算正确的是（）a 2x + 3y = 5xyc 4x3 y 2 (- 1 xy 2 ) = -2x 4

3、 y 42b (-3x 2 y)3 = -9x6 y 3d (x - y)3 = x3 - y 3若(anbmb)3 = a9b15 , 求2m+n的值计算：若（a m+1bn+2 )(a 2n-1b 2n ) = a5b3 ，则求 mn 的值用简便方法计算：下列等式中正确的个数是（）参考答案： 例 13例 2 xa ya例 38例 4m=2，n=3例 510例 68例 710a+b+c例 8 8131 2741 961例 912 例 101 练习题：1. d2. b3.04.1805.c6.1287.08.c9.22410. 311.12.-（a - b)2m+1014313. （1）81（

4、2）1（3）1（4）814. b“”“”at the end, xiao bian gives you a passage. minand once said, people who learn to learn are very happy people. in every wonderful life, learning is an eternal theme. as a professional clerical and teaching position, i understand the importance of continuous learning, life is dilig

5、ent, nothing can be gained, only continuous learning can achieve better self. only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. this document is also edited by my studio professionals, the