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当x取什么值时,下列分式有意义?(1)x/(x-3)(2)(x-百科知识人

2011-02-28 20:34:43w***
(1)x/(x-3) (2)(x-1)/ (2x+1) (3) (x²-1) / (x+1) (4)(x²-1) / |x|+1 要有过程解答。当x取什么值时,下列分式有意义?(1)x/(x-3)(2)(x-1)/(2x+1)(3)(x²-1)/(x+1)(4)(x²-1)/|x|+?

最佳回答

  • (1)x/(x-3) x-3≠0,所以:x≠3 (2)(x-1)/ (2x+1) 2x+1≠0,所以:x≠-1/2 (3) (x²-1) / (x+1) x+1≠0,所以:x≠-1 (4)(x²-1) / |x|+1 |x|+1≠0,所以:x≠±1
    2011-02-28 20:55:32
  • 很赞哦! (266)