Question

已知P=99的9次方除以9的99次方,Q=11的9次方除以11的9次方除以9的90次方,那么P、Q

Answer 1

P= (99^9) /(9^99), Q= (11^9) /(9^90) 吗?

= = = = = = = = =

因为 P= (99^9) /(9^99)

= [ (9*11)^9 ] /(9^99)

= (9^9) *(11^9) /(9^99)

= (11^9) /(9^90),

所以 P=Q.