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Question 47
If pqr = 1, the value of the expression $$1/(1+p+q^{-1}) + 1/(1+q+r^{-1}) + 1/(1+r+p^{-1})$$
Solution
Let p = q = r = 1
So, the value of the expression becomes 1/3 + 1/3 + 1/3 = 1
If we substitute these values, options a), b) and d) do not satisfy.
Option c) is the answer.
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