(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find all values of t so that the three vectors a=(1,2,3) b=(4,5,6) and c=(7,8,t) are coplanar.

2. Relevant equations

(axb) [tex]\bullet[/tex] c=0

3. The attempt at a solution

(1, 2, 3) x (4, 5, 6)

(-3,6,-3)

(-3,6,-3)[tex]\bullet[/tex](7,8,t)

27=3t

t=9

it says find ALL values of t. i keep getting 9 through different combinations. is there only one value of t? thnks

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# Homework Help: Coplanar math problem

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