x减3分之1加2等于3减x分之4减x

2025-12-14 07:20:50
推荐回答(1个)
回答1:

x-1/x=3(x≠0)两边同时乘以x:
x²-1=3x整理成:3x-x²=-1,两边同时除以2得3/2x-1/2x²=-1/2
所求算式为4-1/2x²+3/2x=4-1/2=7/2