Question

2的99次方减2的98次方 除以 2的101次方减2的100次方 等于?

2的99次方减2的98次方 除以 2的101次方减2的100次方 等于?
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Answer 1

2的99次方减2的98次方 除以 2的101次方减2的100次方
=2的98次方/2的100次方
=1/4

Answer 2

(2^99-2^98)/(2^101-2^100)
=2^98(2-1)/[2^100(2-1)]
=2^(98-100)
=2^(-2)
=1/4

Answer 3

(2^99-2^98)÷(2^101-2^100)
=(2*2^98-2^98)÷(2*2^100-2^100)
=[2^98*(2-1)]÷[2^100*(2-1)]
=2^98/2^100
=2^98/(2^2*2^98)
=1/4