已知5.23的x次方=1000,0.00523的y次方=1000,求x分之1-y分之1的值

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已知5.23的x次方=1000,0.00523的y次方=1000,求x分之1-y分之1的值已知5.23的x次方=1000,0.00523的y次方=1000,求x分之1-y分之1的值已知5.23的x次方

已知5.23的x次方=1000,0.00523的y次方=1000,求x分之1-y分之1的值
已知5.23的x次方=1000,0.00523的y次方=1000,求x分之1-y分之1的值

已知5.23的x次方=1000,0.00523的y次方=1000,求x分之1-y分之1的值
5.23的x次方=1000,0.00523的y次方=1000
所以,5.23=1000^(1/x),0.00523=1000^(1/y)
5.23/0.00523=1000^(1/x)/1000^(1/y)=1000^(1/x-1/y)
即1000=1000^(1/x-1/y)
所以,1/x-1/y=1

=1000

xlg5.23=3,x=3/lg5.23;
y(lg5.23-3)=3,y=3/(lg5.23-3);
1/x-1/y=(lg5.23)/3-(lg5.23-3)/3=(lg5.23-lg5.23+3)/3=1

由5.23的x次方=1000
得X=log以5.23为底1000
同理Y=log以0.00523为底1000
原式=1/log以5.23为底1000-1/log以0.00523为底1000
=lg5.23/lg1000-lg0.00523/lg1000
=(lg5.23-lg0.00523)/100
=lg1000/100
=1