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Grade 11Vectors

magnitude of vector 2a+3b if a= i+j-2k and b=2i-j+k

Profile image of sanket kothawade
15 Years agoGrade 11
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2 Answers

Profile image of vikas askiitian expert
15 Years ago

2a+3b = 2(i + j - 2k) + 3(2 i- j + k)

          =5i - j - k

magnitude = (52 + 12+12)1/2 = (27)1/2 units

Profile image of Aniket Patra
15 Years ago

The vector sum comes out to be 8i-j-k.So magnitude is nearly 8.12.

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