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[" 16.For "a,b,>0," let "],[5a-b,2a+b,a+...

[" 16.For "a,b,>0," let "],[5a-b,2a+b,a+2b" be in A.P.and "],[(b+1)^(2),ab+1,(a-1)^(2)" are in G.P.,then "],[" the value of "(a^(-1)+b^(-1))" is "]

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