已知M/N=7/3,则M+N/M-N,
问题描述:
已知M/N=7/3,则M+N/M-N,
答
即M=7N/3
所以原式=(7N/3+N)/(7N/3-N)
=(10N/3)/(4N/3)
=10/4
=5/2