If $5,5 r , 5 r ^ { 2 }$ are the lengths of the sides of a triangle, then $r$ can not be equal to: (1) $\frac { 3 } { 4 }$ (2) $\frac { 3 } { 2 }$ (3) $\frac { 5 } { 4 }$ (4) $\frac { 7 } { 4 }$
If $5,5 r , 5 r ^ { 2 }$ are the lengths of the sides of a triangle, then $r$ can not be equal to:\\
(1) $\frac { 3 } { 4 }$\\
(2) $\frac { 3 } { 2 }$\\
(3) $\frac { 5 } { 4 }$\\
(4) $\frac { 7 } { 4 }$