x分之x-1除以(x-x分之2x-1
问题描述:
x分之x-1除以(x-x分之2x-1
答
x分之x-1除以(x-x分之2x-1
=(x-1)/x ÷ (x²-2x+1)/x
=(x-1)/(x-1)²
=1/(x-1)