证明向量[tex=5.357x1.357]+C8mywX8k76LNScDIiFtBt99ygwY0oo+e7Rfa56B7SE=[/tex]平行于平面[tex=8.214x1.214]kKqB8Yq2yGFHa23kcYIFvQ==[/tex]的充要条件为[tex=7.214x1.143]IqB98bfg73sa50cUjG0WVQ==[/tex]
举一反三
- 求平行于向量 [tex=5.429x1.357]x/6iEXip+O1XKxx+AJCEK+iJDnwWTs6vrfapGMpSAys=[/tex] 的单位向量.
- 设f(x)具有性质：[tex=8.571x1.357]8gPeznjMnng12qtkk9Vgczii1Sh4d1qJxc9iHYT5+YI=[/tex]证明：必有f(0)=0，[tex=5.5x1.357]rt5qCY7TXHcsFUQrD44nPA==[/tex]（p为任意正整数）
- 设向量[tex=0.643x0.786]ickGNE6wjIgwQyRxOmFROA==[/tex]的方向向量平行于向量[tex=6.071x1.357]SJEmrtmdOPUsej4CEaY1JoScA6qLRZqz5+L4XSqoV54=[/tex]和向量[tex=6.071x1.357]NE7b5xvzQiP/cb6Dp5w3as0vXRc48ynY1Q762W0Ahbw=[/tex]之间的角平分线且[tex=3.857x1.571]CCFg+gy3IK7+/X/+IFDiL/rzje9iKYnsCf7SRHzWZT4=[/tex]，求向量[tex=0.643x0.786]ickGNE6wjIgwQyRxOmFROA==[/tex].
- 求直线[tex=5.786x2.786]7EJHVCtO2IWq3KpdB+jQso4Dk6cDNAlt0HYK57UpaiMs/YJo/cOijSifvIbFCxOeXVt8wwyrjIwfgEtrEt5e4g==[/tex]，和平面[tex=8.214x1.214]wQ8SyCzV8Tkb1PgvPX1Bqa9uLQiGQhCP1ypnGHLVDTE=[/tex]相交、平行和重合的充要条件.
- 假设所有变量均为整型, 则表达式[tex=10.571x1.357]LwbIklUNi3bG92VfuhR/2s2h8bPim4KlwMHG5pBJ+3PKMuWS/4OGtcmSMjC2vxzVyrIKC8OVgBRFsqcS0s1A1u2X9g+VlWD58VLIpTfy7/0=[/tex]后[tex=0.571x0.786]FLCxr+5eRIYnIT0kyTRrXg==[/tex]的值为 未知类型：{'options': ['7', '8', '6', '2'], 'type': 102}