/=5-/
<6x+2>/=5-<2x2+6x+4>/<3x+1>
数学人气：381 ℃时间：2020-10-02 01:14:24
优质解答
/=5-/2(3x+1)/(x2+3x+2)=5-2(x2+3x+2)/(3x+1)设(3x+1)/(x2+3x+2)=t则2t=5-2/t2t^2-5t+2=0(t-2)(2t-1)=0t=2或t=1/2则(3x+1)/(x2+3x+2)=22x^2+3x+1=0(x+1)(2x+1)=0x=-1或x=-1/2(3x+1)/(x2+3x+2)=1/2x^2-3x=0x(x-3)=0x=...
我来回答
类似推荐