2^a=100
a=log(2)100
5^b=100
b=log(5)100
a的-1次方加b的-1次方=1/ log(2)100+1/ log(5)100
=1/( lg100/lg2)+1/(lg100/lg5)
=(lg2+lg5)/lg100
=lg10/lg100
=1/2
2^a=100
a=log(2)100
5^b=100
b=log(5)100
a的-1次方加b的-1次方=1/ log(2)100+1/ log(5)100
=1/( lg100/lg2)+1/(lg100/lg5)
=(lg2+lg5)/lg100
=lg10/lg100
=1/2