(22^99-2^98)/(2^101-2^100)
是22^99还是2^99
如果是2^99则
(2^99-2^98)/(2^101-2^100)
=2^98*(2-1)/[2^100(2-1)]
=2^98/2^100
=2^98/(2^98*2^2)
=1/4