For any three positive real numbers $a, b$ and $c$. If $9(25a^2 + b^2) + 25(c^2 - 3ac) = 15b(3a + c)$. 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 $c$. If $9(25a^2 + b^2) + 25(c^2 - 3ac) = 15b(3a + c)$. 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.