Question

Найдите значение выражения, номер 10

Answer 1

10. a/(ab -b) * (a² -b²)/a =
(a *(a -b)(a +b) / b(a -b)*a = (a +b) /b =(0.6 -(-0.4)) /(-0.4) =(0.6 +0.4) /(-0.4) = -2.5