x+1分之2x=1 x-2分之x-x^2-4分之1=1 x+3分之5=x分之2 x-2分之6=x+3分之x -1
问题描述:
x+1分之2x=1 x-2分之x-x^2-4分之1=1 x+3分之5=x分之2 x-2分之6=x+3分之x -1
答
(1)2x/(x+1)=12x=x+1x=1(2) x/(x-2)-1/(x²-4)=1x(x+2)-1=x²-4x²+2x-1=x²-42x=-3x=-3/2(3) 5/(x+3)=2/x5x=2(x+3)5x=2x+6x=2(4) 6/(x-2)=(x-1)/(x+3)6(x-2)=(x-1)(x+2)6x-12=x²+x-2x²-5...