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数学
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1- a+b分之a+2b
人气:217 ℃ 时间:2020-02-04 03:32:44
解答
1-(a+2b)/(a+b)
=(a+b)/(a+b)-(a+2b)/(a+b)
=(a+b-a-2b)/(a+b)
=-b/(a+b)��3��10�ĸ����η������Ĵη� ���� ��3��10�ĸ���η�����ƽ�����ڣ�ԭʽ=3⁴��10^-8��(3²��10^-10)=3⁴��10^-8��3²��10^-10=3⁴��3²��10^-8��10^-10=3²��10²=9��100=900
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