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关于X的方程,ax+1=4x-1的解是正整数,则整数a的值是
人气:383 ℃ 时间:2019-10-09 08:06:07
解答
4x-ax=2
(4-a)x=2
x=2/(4-a)是正整数
所以4-a是2的约数
4-a=1,4-a=2
a=3,a=2
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