来自田艳兵的问题
Thelinel₁andl₂intersectatthepointCwithpositionvectori+5j+11K.Theequationofl₁andl₂arer=i+5j+11k+λ（3i+2j-2k)andr=i+5j+11k+μ(8i+11j+6k),whereλandμarerealparameters.a)Find,intheformax+by+cz=d,ane
Thelinel₁andl₂intersectatthepointCwithpositionvectori+5j+11K.Theequationofl₁andl₂arer=i+5j+11k+λ（3i+2j-2k)andr=i+5j+11k+μ(8i+11j+6k),whereλandμarerealparameters.
a)Find,intheformax+by+cz=d,anequationoftheplanewhichcontainsl₁andl₂.
ThepointAhaspositionvector4i-j+5kandthelinethroughAperpendiculartotheplaneandmeetsitatB.Find,
b)thelengthofAB
c)theperpendiculardistanceofBfroml₁,givingyouranswerscorrectto3significantfigures.
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2019-08-25 18:58