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> 对于字母m的任何值,等式都能成立的是()A.2m-2=2m2B.(m2+1)-2=1(m2+1)2C.(m2-1)0=1D.(m+1)-1=1m+1-数学
对于字母m的任何值,等式都能成立的是()A.2m-2=2m2B.(m2+1)-2=1(m2+1)2C.(m2-1)0=1D.(m+1)-1=1m+1-数学
题目简介
对于字母m的任何值,等式都能成立的是()A.2m-2=2m2B.(m2+1)-2=1(m2+1)2C.(m2-1)0=1D.(m+1)-1=1m+1-数学
题目详情
对于字母m的任何值,等式都能成立的是( )
A.2m
-2
=
2
m
2
B.(m
2
+1)
-2
=
1
(
m
2
+1)
2
C.(m
2
-1)
0
=1
D.(m+1)
-1
=
1
m+1
题型:单选题
难度:偏易
来源:不详
答案
A、当m=0时,等式不成立;
B、∵m2+1>0,∴对于字母m的任何值,等式都能成立;
C、当m=±1时,等式不成立;
D、当m=-1时,等式不成立.
故选B.
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题目简介
对于字母m的任何值,等式都能成立的是()A.2m-2=2m2B.(m2+1)-2=1(m2+1)2C.(m2-1)0=1D.(m+1)-1=1m+1-数学
题目详情
答案
B、∵m2+1>0,∴对于字母m的任何值,等式都能成立;
C、当m=±1时,等式不成立;
D、当m=-1时,等式不成立.
故选B.