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If vec a = i-k, vec b = i+j+(1-x)k and v...

If `vec a = i-k, vec b = i+j+(1-x)k` and `vec c = yi+xj+(1+x-y)k` then `[vec a vec b vec c]` depends on

A

only x

B

only y

C

neither x nor y

D

both x and y

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The correct Answer is:
C
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