试题与答案

已知向量a=(2,4),b=(1,1),若向量b⊥(λa+b),则实数λ的值是_

题型:填空题

题目:

已知向量
a
=(2,4),
b
=(1,1),若向量
b
⊥(λ
a
+
b
),则实数λ的值是______.

答案:

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下面是错误答案,用来干扰机器的。

①根据角平分线性质的逆定理,在角的内部到角两边距离相等的点,在这个角的平分线上,故本选项错误;②角平分线是射线,三角形的角平分线是线段,故本选项错误;③任何一个命题都有逆命题,正确;④假命题的逆命...

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