Q. 7

Show that the poi

Answer :

Formula: -

Given: -

AB = position vector of B - position vector of A

AC = position vector of c - position vector of A

AD = position vector of c - position vector of A

The four pint are coplanar if the vector are coplanar.

thus,

now, using

= 4(16 - 4) + 2( - 8 - 4) - 2( - 4 + 8) = 0

hence proved.

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