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सिद्ध कीजिए की : ( 5)/( 1.2.3) +( 7)/...

सिद्ध कीजिए की :
` ( 5)/( 1.2.3) +( 7)/( 3.4.5) +(9)/( 5.6.7)+...........infty =3 log _e 2-1 `

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