[a]=3[b]
2种情况:
(1)
ab同号.a-b=±8
=>a=12,b=4;a=-12,b=-4.
(2)a,b异号
[a]+[b]=8
a=-6,b=2;a=6,b=-2.(注:找不到绝对值符号所以用[]代替.希望不要误解)
已知数a的绝对值是数b的绝对值的3倍,且在数轴上表示这数a,数b两点之间的距离是8,求这两个数a和数b(请说出方法并解答)
已知数a的绝对值是数b的绝对值的3倍,且在数轴上表示这数a,数b两点之间的距离是8,求这两个数a和数b(请说出方法并解答)
数学人气:909 ℃时间:2019-11-04 13:43:09
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