Express the vector α =(1, -2, 5) as a linear combination of

Express the vector α =(1, -2, 5) as a linear combination of e1 =(1, 1, 1), e2 = (1, 2, 3) and e3=(2, -1, 1)
(a) α=-6e1 +3 e2 +3 e3
(b) α=-6e1 +3 e2 + 2e3
(c) α=6e1 + 3e2 +2 e3
(d) α=6e1 +4 e2 + 2e3

Anurag Mishra Professor Asked on 28th May 2016 in Maths.
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