AP EAMCET · Maths · Vector Algebra
If are position vectors of respectively and if are mid points of sides and , then is equal to
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Given, i^+4j^+3k^,i^+2j^+3k^,3i^+2j^+k^ are position vectors of A,B,C respectively. D is mid point of BC, then position vector of D is 1+3i^+2+2j^+3+1k^2=2i^+2j^+2k^ Similarly, position vector of E is 1+3i^+4+2j^+3+1k^2=2i^+3j^+2k^ Then, DE→=2i^+3j^+2k^-2i^+2j^+2k^=j^.
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