检验下列各题括号内的数是否为前面方程的解:
检验下列各题括号内的数是否为前面方程的解:
(1)3x+1=x+1/2+13(0,5)(2)x^2-5x-6=0(1,-1,6)急!
(1)3x+1=x+1/2+13(0,5)(2)x^2-5x-6=0(1,-1,6)急!
数学人气:699 ℃时间:2019-10-19 17:17:19
优质解答
1.代入X=0,左边=1,右边=27/2,左边≠右边.X=1不是方程的解代入X=5,左边=16,右边=3+13=16,左边=右边.X=5是方程的解2.代入X=1,左边=1²-5-6=-10.右边=0.左边≠右边,X=1不是方程的解代入X=-1.6.左边=2.56+8-6=4.56,...
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