(x-3)/(x²-1)+3/(1-x)=(x-3)/(x+1)(x-1)-3(x+1)/(x+1)(x-1)
1个回答
你好第一处就错了,选A
错在-3(x+1)/(x+1)(x-1)
此处应该是-3(x+1)/(x+1)(1-x)
相关问题
第一题 (x-1)/(x^2/3+x^1/3+1)+(x+1)/(x^1/3+1)-(x-x^1/3)/(x^1/3-1
2x(3+1)x(3x3+1)x(3x3x3x3+1)x(3x3x3x3x3x3x3x3+1)+1=?急 注:x是乘号,
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(x-1)/3-x/2=1 1-(2x)-1/5=x/3 (x-1)/2+1=x/3 2/3-8x=3-(1/2)x
(1) x/x+1-2/3x-3=1; (2) 1/9x-3-x/3x-1=2/3
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计算:(1)(x-3)(x-3)-6(x²+x-1) (2)(2x+1)²-(x+3)²-(x-1)²+1