Question

Помогите решить примеры с решениями

Answer 1

293.
$sqrt{a-b^2}= sqrt{0.4-0.2^2}= sqrt{0.4-0.04} = sqrt{0.36}=0.6$
294.
$sqrt{x+y^2} = sqrt{0.4+0.3^2}= sqrt{0.4+0.09}= sqrt{0.49}=0.7$
295.
$frac{1}{ sqrt{1+x^2}}= frac{1}{ sqrt{1+ frac{3}{4}^2}}= frac{1}{ sqrt{1+ frac{9}{16} } } = frac{1}{ sqrt{ frac{25}{16}} }= frac{1}{1.25}=0.8$
296.
$frac{y}{ sqrt{1-y^2} } = frac{ frac{4}{5} }{ sqrt{1- frac{4}{5}^2} } = frac{0.8}{ sqrt{1- frac{16}{25} } } frac{0.8}{1-0.8} = frac{0.8}{0.2}=4$
297.
$frac{1}{ sqrt{a}} - sqrt{c} = frac{1}{ sqrt{0.04} } - sqrt{0.64} = frac{1}{0.2}-0.8=5-0.8=4.2$