यदि किसी समान्तर श्रेढ़ी के प्रथम p , q ,...

यदि किसी समान्तर श्रेढ़ी के प्रथम p , q , r पदों का योगफल क्रमशः a , b तथा c हो तो सिद्ध कीजिए कि
`(a)/(p)(q-r)+(b)/(q)(r-p)+(c)/(r)(p-q)=0`

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