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练闯考,第十四章整式的乘法与因式分解,八年级上册人教版数学,14,.,1整式的乘法,14,.,1.3积的乘方,第十四章整式的乘法与因式分解八年级上册人教版数学14.1,积的乘方公开课ppt课件,1,积的乘方,,,等于把积的每一个因式分别,_,,,再把所得的,_,相乘,,,用字母表示为:,(ab),n,_(n,为正整数,),2,积的乘方公式的逆应用,,,即,a,n,b,n,_(n,为正整数,),练习,1,:,(2016,重庆,),计算,(x,2,y),3,的结果是,(,),A,x,6,y,3,B,x,5,y,3,C,x,5,y,D,x,2,y,3,乘方,幂,a,n,b,n,(ab),n,A,1积的乘方,等于把积的每一个因式分别_,再把所得,积的乘方公开课ppt课件,知识点,1,:积的乘方,1,(,2016,盐城,),计算,(,x,2,y),2,的结果是,(,),A,x,4,y,2,B,x,4,y,2,C,x,2,y,2,D,x,2,y,2,2,下列运算正确的是,(,),A,a,2,a,3,a,6,B,(,2a),3,6a,3,C,(3a,4,),3,27a,12,D,a,4,a,5,a,9,A,C,知识点1:积的乘方AC,3,(2016,青岛,),计算,a,a,5,(2a,3,),2,的结果为,(,),A,a,6,2a,5,B,a,6,C,a,6,4a,5,D,3a,6,4,如果,a,n,5,,,b,n,3,,,那么,(ab),n,_,D,15,3(2016青岛)计算aa5(2a3)2的结果为(,5,计算:,(1)(2ab),3;,(2)(,3x),4,;,解:,8a,3,b,3,(3)(x,m,y,n,),2;,(4)(,210,3,),4,.,解:,x,2m,y,2n,解:,81x,4,解:,1.610,13,5计算:解:81x4解:1.61013,1,1,积的乘方公开课ppt课件,B,B,9,(1),若,2,m,a,,,3,m,b,,,则,6,m,_,;,(2),若,2,x,1,3,x,1,6,2x,1,,,则,x,的值为,_,ab,2,9(1)若2ma,3mb,则6m_;ab2,解:,64a,12,b,18,(3)(x,y),3,(x,y),2,3,;,解:,(x,y),9,(x,y),6,(4)(,2xy,2,),6,(,3x,2,y,4,),3,.,解:,37x,6,y,12,解:64a12b18(3)(xy)3(xy)23;,积的乘方公开课ppt课件,(2),已知:,x,3n,2,,,且,n,为正整数,,,求,(2x,3n,),2,(,3x,2n,),3,的值,解:原式,4(x,3n,),2,27(x,2n,),3,23(x,3n,),2,234,92,(2)已知:x3n2,且n为正整数,求(2x3n)2(,
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