先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]}先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]},其中-根号2007。小明同学做题时把X错抄成了x=根号2007
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![先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]}先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]},其中-根号2007。小明同学做题时把X错抄成了x=根号2007](/uploads/image/z/1248262-70-2.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9A%EF%BD%9B%5B%EF%BC%88X%EF%BC%8D3%EF%BC%89%C3%B7%EF%BC%88X%EF%BC%8B3%EF%BC%89%5D%EF%BC%8B%5B%EF%BC%886X%EF%BC%89%C3%B7%EF%BC%88X%26sup2%3B%EF%BC%8D9%EF%BC%89%5D%EF%BD%9D%E5%85%88%E5%8C%96%E7%AE%80%EF%BC%8C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9A%EF%BD%9B%5B%EF%BC%88X%EF%BC%8D3%EF%BC%89%C3%B7%EF%BC%88X%EF%BC%8B3%EF%BC%89%5D%EF%BC%8B%5B%EF%BC%886X%EF%BC%89%C3%B7%EF%BC%88X%26sup2%3B%EF%BC%8D9%EF%BC%89%5D%EF%BD%9D%EF%BC%8C%E5%85%B6%E4%B8%AD%EF%BC%8D%E6%A0%B9%E5%8F%B72007%E3%80%82%E5%B0%8F%E6%98%8E%E5%90%8C%E5%AD%A6%E5%81%9A%E9%A2%98%E6%97%B6%E6%8A%8AX%E9%94%99%E6%8A%84%E6%88%90%E4%BA%86x%EF%BC%9D%E6%A0%B9%E5%8F%B72007)
先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]}先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]},其中-根号2007。小明同学做题时把X错抄成了x=根号2007
先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]}
先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]},其中-根号2007。小明同学做题时把X错抄成了x=根号2007。但他的答案也是正确的,请解释这是怎么回事
先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]}先化简,再求值:{[(X-3)÷(X+3)]+[(6X)÷(X²-9)]},其中-根号2007。小明同学做题时把X错抄成了x=根号2007
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因为根号2007的值与答案X的值相同、所以小明把X错抄成了x=根号2007不影响最后的答案!
化简得:(x²+9)/(x²-9)
因为-根号2007与根号2007的平方相同
所以他的答案也正确