The area of the triangle formed by 2i^+j^-k^ and i^+j^+k^ is_____

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

3 sq. unit

23 sq. unit

214 sq. unit

142 sq. unit

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Area =12|A→×B→| A→×B→=|i^j^k^21−1111| =i^(1+1)+j^(−1−2)+k^(2−1)=2i^−3j^+k^ ∴ Area =124+9+1=142sq. units

Watch 3-min video & get full concept clarity