Algebra and Applications Test 1

Question : 30 of 40

Marks: +1, -0

p + q = 10

and

pq = 5

, then the numerical value of

p/q+q/p

will be :

Solution:

pq = 5p + q = 10

On squaring we get

p^2 + q^2 + 2pq = 100

p^2 + q^2 = 100 - 10 = 90

∴p/q+q/p={p^2+q^2}/{pq}=18

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