Let product of 3 terms in G.P. is 27. If sum of these 3 terms lies in the interval $\mathbf { R } - \mathbf { ( a , b ) }$, then $\mathbf { a } ^ { \mathbf { 2 } } \boldsymbol { + } \mathbf { b } ^ { \mathbf { 2 } }$ is equal to
Let product of 3 terms in G.P. is 27. If sum of these 3 terms lies in the interval $\mathbf { R } - \mathbf { ( a , b ) }$, then $\mathbf { a } ^ { \mathbf { 2 } } \boldsymbol { + } \mathbf { b } ^ { \mathbf { 2 } }$ is equal to