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数学
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(1)(a-1)x-4=0则a=多少?(2)m=1/2(a+b)n若a=2,n=4,m=8则b=?
人气:497 ℃ 时间:2020-05-23 07:58:16
解答
1,
(a-1)x-4=0
(a-1)x=4
a-1=4/x
a=4/x+1
2,
数据代入得16=2+b
b=14
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