Qualification > Math

Vectors

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astarmathsandphysics:
use s or t for parameters. I will try it now

astarmathsandphysics:
I have looked at this question.
r_1=t(10,8,-1)
r_2=(200,100,-25)+s(5,7,Z)=(200+5s,100+7s-25+sZ)
d=|r_1-r_2|=sqrt((200+5s-10t)^2+(100+7s-8t)^2+(25+sZ+t)^2)
expand and simplify then differentiate with respect to s,t,Z and solve three simultaneous equations. Not a typical A level question. What module is it?

Light:
it is. from Cie A level pure maths 3 and 4 textbook.the miscellaneous ex.i dont get the diffrentiation part.what does it have to do with vectors?the earlier ques u mind explain also?dont get it.

astarmathsandphysics:
No clear line between degreen and A level I think. Have you enough to do it or shall I work it through? If I do I whink it will be on paper

Light:
it would be nice if u did that.put it in adobe reader.

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