计算:x分之x+1 × (x+1分之2x)² - (x-1分之1 - x+1分之1)

问题描述:

计算:x分之x+1 × (x+1分之2x)² - (x-1分之1 - x+1分之1)

原式=(x+1)/x*4x²/(x+1)²--(x+1-x+1)/(x+1)(x-1)
=4x/(x+1)-2/(x+1)(x-1)
=(4x²-4x-2)/(x²-1)计算:(2y分之x)² ×2x分之y - y²分之x ÷ x分之2y²