1.

Show that the following vectors are co-planar(ii) 5hati+6hatj+7hatk,7hati-8hatj+9hatk,-3hati+20hatj+5hatk.

Answer»


Answer :` rArr 7 = 7 `
Which SATISFIES the (3) equation .
THUS , ONE vector is a linear COMBINATION of other TWO vectors .
Hence , the given vectors are co-planar


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