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[" 20.For any three positive real number...

[" 20.For any three positive real numbers a,b and c,"],[9(25a^(2)+b^(2))+25(c^(2)-3ac)=15b(3a+c)" ."],[" Then: "],[[" (1) "a,b" and "c" are in G.P."],[" (2) "b,c" and a are in G.P."],[" (3) "b,c" and a are in A.P."],[" (4) "a,b" and "c" are in A.P "]]

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For any three positive real numbers a, b and c, 9(25a^2+b^2)+25(c^2-3ac)=15b(3a+c) Then: (1) b, c and a are in G.P. (2) b, c and a are in A.P. (3) a, b and c are in A.P (4) a, b and c are in G.P

For any three positive real numbers a, b and c, 9(25a^2+b^2)+25(c^2-3ac)=15b(3a+c) Then: (1) b, c and a are in G.P. (2) b, c and a are in A.P. (3) a, b and c are in A.P (4) a, b and c are in G.P