Algebra and Applications Test 1

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Question : 19 of 40

Marks: +1, -0

If

k/v+w/l=1

and

l/w+u/j=1

then which one of the following corresponds to the value of the expression

j/u+v/k

?

0
1
-1
2
None of these

Solution:

∵k/v+w/l=1

⇒k/v=1-w/l

⇒v/k=l/{l-w}

and

u/j=1-l/w

⇒j/u=w/{w-l}

On adding equations (i) and (ii), we get

j/u+v/k=l/{l-w}-w/{l-w}={1}

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