Question

vectors
help please

Answer 1

u ,v,w non-coplanar vectors then
(u+v-w).[(u-v)x(v-w)]=

Answer 2

A)0
B)u.(v x w)
C)u.(w x v)
D)3u.(v x w)

Answer 3

@divu.mkr

Answer 4

Just for the purpose of solving , assume u , v and w vectors as i+j , j , j+k ...I chose them because u-v=i and v-w=-k , so easy to plug values and get answer ..i got it as D..thinking of the proper method..

Answer 5

nope
the ans is B

Answer 6

i want to know the working

Answer 7

Yep , B ..i made a calculation error

Answer 8

show me the working pls

Answer 9

By this method of assuming values ?
I am still thinking about the "proper" method

Answer 10

yep
i want to know
@divu.mkr will tell me

Answer 11

okaay

Answer 12

@divu.mkr start

Answer 13

isnt it simple dot and cross??

Answer 14

how to expand

Answer 15

say

Answer 16

normal expressions of dots and crosses..
cross --> uXv - uXw + vXw
now take dot with every term outside
just 3 terms will be there

Answer 17

I thought it would be very lengthy to expand ! Turns out it wasn't lengthy at all ! :)