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Question Number 133653 by greg_ed last updated on 23/Feb/21

hi, everybody !  how to prove that 𝛑 is an irrational number ???

hi,everybody!howtoprovethatπisanirrationalnumber???

Answered by Dwaipayan Shikari last updated on 23/Feb/21

1−(1/3)+(1/5)−(1/7)+(1/9)−(1/(11))+...=(π/4)  As It is an Infinte series so it can never be rational  Other series  1+(1/2^4 )+(1/3^4 )+...=(π^4 /(90))  1+(1/2)((1/(2.1!)))^2 +(1/3)(((1.3)/(2^2 .2!)))^2 +(1/4)(((1.3.5)/(2^3 .3!)))^2 +...=(4/π)

113+1517+19111+...=π4AsItisanInfinteseriessoitcanneverberationalOtherseries1+124+134+...=π4901+12(12.1!)2+13(1.322.2!)2+14(1.3.523.3!)2+...=4π

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