Question

Ayudenme con esta hoja plox

Answer 1

Explicación paso a paso:

4)

$x = \frac{ab}{a + b} \\ {a}^{2} = mc \\ {h}^{2} = mn \\ ab = hc \\ \frac{1}{ {h}^{2} } = \frac{1}{ {a}^{2} } + \frac{1}{ {b}^{2} } \\ {a}^{2} + {b}^{2} = {x}^{2} + {y}^{2} \\ x = 2 \sqrt{Rr}$