tolong dijawab ya no 19 makasih pakai cara ya.

[tex] {7}^{ \frac{1}{2} } \times {7}^{1 \frac{1}{2} } = {7}^{ \frac{1}{2} } \times {7}^{ \frac{3}{2} } \\ = {7}^{ \frac{1 + 3}{2} } = {7}^{ \frac{4}{2} } = {7}^{2} = 49[/tex]
semoga bermanfaat