If \[a\] be the arithmetic mean of \[b\] and \[c\] and \[{{G}_{1}},\ { – McqOptions

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1.	If \[a\] be the arithmetic mean of \[b\] and \[c\] and \[{{G}_{1}},\ {{G}_{2}}\] be the two geometric means between them, then \[G_{1}^{3}+G_{2}^{3}=\]
A.	\[{{G}_{1}}{{G}_{2}}a\]
B.	\[2{{G}_{1}}{{G}_{2}}a\]
C.	\[3{{G}_{1}}{{G}_{2}}a\]
D.	None of these
Answer» C. \[3{{G}_{1}}{{G}_{2}}a\]

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