1) Given r, = 31 – 2j + k, r, = 2i – 4j – 3k, 13 = -i+ 2j + 2k, find the magnitude of 2r1 – 3r2 – 5r3. 2) Determine the value of a so that A = 2i + aj + k and B = 4i – 2j – 2k are perpendicular.

Q: 14. The vectors a and b are such that |a| = 3, |b| = 5 and a. b = -14, then |a – b| = %3D A 62 B V62

A: Solution: Given vectors a and b such that a=3,  b=5 and a·b=-14

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A: We have to find the value of m from given condition

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A:

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A: NOTE: Refresh your page if you can't see any equations. . here we have as we can see here  and

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A: Given: ÷4=6

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A: M23 is the matrix with 2 rows and 3 columns. That is a matrix of order 2×3.

Q: 14+m/10=24

A: Given,          14 + m10 = 24

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A: Given : PS is parallel to QR TP = 15TS = 16PQ = 30

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