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माना f(x) = cos^(-1)x + cos^(-1)((sqrt(3...

माना `f(x) = cos^(-1)x + cos^(-1)((sqrt(3)x + sqrt(1-x^(2)))/2)` है। यदि `sum_(r=1)^(100)f(1-(1/10)^(r))=(P pi)/Q`, जहाँ `P` एवं `Q` सह अभाज्य संख्याएं हैं, तो
(`P-16Q`) का मान ज्ञात कीजिये।

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