两平面α、β的法向量分别为u=(3,-1,z),v=(-2,-y,1),若α⊥β,则y+z的值是()A.-3B.6C.-6D.-12-数学

题目简介

两平面α、β的法向量分别为u=(3,-1,z),v=(-2,-y,1),若α⊥β,则y+z的值是()A.-3B.6C.-6D.-12-数学

题目详情

两平面α、β的法向量分别为http://www.mofangge.com/html/qDetail/02/g0/201312/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAVCAYAAACQcBTNAAAAQElEQVQokWNggAIlJaX/DKSAAdSgpKRUjwNjalBSUmrAhUlyzijAC5SUlP4jRwA6H6sGfPzBqBimAB3j1UBVAACvBSpXeLiuNwAAAABJRU5ErkJggg===(3,-1,z),http://www.mofangge.com/html/qDetail/02/g0/201312/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAsAAAAVCAYAAACQcBTNAAAAQElEQVQokWNggAIlJaX/DKSAAdSgpKRUjwNjalBSUmrAhUlyzijAC5SUlP7DMDY+Vg34+Dg1EJWQaKeYJIVUBwDl3CeNv3XGcAAAAABJRU5ErkJggg===(-2,-y,1),若α⊥β,则y+z的值是(  )
A.-3B.6C.-6D.-12
题型:单选题难度:中档来源:不详

答案

B

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