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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,指数幂的运算,高级中学:卜荣良,复习回顾,=,-,n,m,a,=,n,m,a,n,m,a,1,=,),1,*,0,(,n,N,n,m,a,且,),1,*,0,(,n,N,n,m,a,且,(1),a,r,a,s,=,a,r+s,(,a,0,r,s,R,);,(2)(,a,r,),s,=,a,rs,(,a,0,r,s,R,);,(3)(,ab,),r,=,a,r,b,r,(,a,b,0,r,R,),.,应用举例,解:,原,式,);,3,(,),6,)(,2,)(,1,(,6,5,6,1,3,1,2,1,2,1,3,2,b,a,b,a,b,a,-,-,.,),)(,2,(,8,8,3,4,1,-,n,m,应用举例,练习:,第二教材,先,把根指数化成分数指数,,再,利用指数幂的运算性质计算;注意结果一定要,简洁,.,;,12,5,.,1,3,2,),1,(,6,3,).,0,(,),2,(,3,2,2,a,a,a,a,应用举例,3.,化简:,1,2,1,2,-,-,+,-,+,x,x,x,x,3,:,4,2,1,2,1,=,+,-,x,x,、若,.,2,3,:,2,2,2,3,2,3,的值,求,-,+,-,+,-,-,x,x,x,x,应用举例,化简:,3,3,3,2,3,3,2,3,1,3,4,),2,1,(,2,4,8,a,a,b,a,ab,b,b,a,a,-,+,+,-,谢 谢,随堂练习,课后,作业:,上交作业:,数学单元检测,08,指数,同步复习作业:,抽查!,一课,3,练第,45,页第,1,至,7,题,.,指数幂的运算,小,结,(1),a,r,a,s,=,a,r+s,(,a,0,r,s,R,);,(2)(,a,r,),s,=,a,rs,(,a,0,r,s,R,);,(3)(,ab,),r,=,a,r,b,r,(,a,b,0,r,R,),.,
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