यदि (a)/(b+ c) , (b) /(c + a) , (c)/(a +...

यदि `(a)/(b+ c) , (b) /(c + a) , (c)/(a + b)` A.P. में हैं और a + b + c `ne` 0, सिद्ध करें कि `(1)/(b + c) , (1)/(c + a) , (1)/(a + b ) ` A.P. में हैं ।

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