(2011•琼海一模)设3
a=4
b=m,且
+=2,则m=( )
A. 12
B. 2
C. 4
D. 48
人气:196 ℃ 时间:2019-09-29 03:19:37
解答
由3
a=4
b=m得,a=
,b=
,
∴
=
,
=
,∴
+
=
+
=
=2,
∴m
2=12,即m=2
,
故选B.
推荐
猜你喜欢
- 一辆汽车从甲地到乙地,行了全程的40%,离终点还有5千米,甲乙两地相距多少千米
- the big minute hand did not move.为什么不是the big minute hand was not move.
- However mean your life is,meet it and live it ;do not shun it and call it hard names.It is not so bad as you are.It look
- 已知直线l1:y=x+m和L2:y=-2x+n交于点P(-2,0),l1交y轴于点A,l2交y轴于点B.
- 『汉译英』“第二,我们应该把老师当成朋友.不要害怕老师,多与老师相处.”求翻译
- 士不可不弘毅,任重而道远.
- 民族资本主义与官僚资本主义的区别
- "我来了,我看见了,我征服了"的英文原文是什么?