if a(1/b+1/c),b(1/a+1/c),c(1/a+1/b) are in A.p,prove that a,b,c are in

1.	if a(1/b+1/c),b(1/a+1/c),c(1/a+1/b) are in A.p,prove that a,b,c are in a.p
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