Question

Me ajudem a responder essas perguntas por favor

Answer 1

$\frac{7 \sqrt{2} }{2 \sqrt{98} } = \frac{7}{2} \times \frac{ \sqrt{2} }{ \sqrt{98} } = \frac{7}{2} \times \sqrt{ \frac{2}{98} } = \\ = \frac{7}{2} \times \sqrt{ \frac{1}{49} } = \frac{7}{2} \times \frac{ \sqrt{1} }{ \sqrt{49} } = \frac{7}{2} \times \frac{1}{7} = \\ = \frac{1}{2}$