Question

Сравните числа A =

Answer 1

Надо все внести под корень
$3/5 \sqrt{20}= \sqrt{9*20/25}= \sqrt{36/5}$
$2/3 \sqrt{12}= \sqrt{4*12/9}= \sqrt{16/3}$
16/3<36/5

Answer 2

$A1= \frac{3 \sqrt{20} }{5}>A2= \frac{2 \sqrt{12} }{5}$
A1≈2.6
A2≈2.3