Дана геометрическая прогрессия {Bn} .Вычислите сумму 2 первых членов,если B4=-16,q=-2

Вставьте предлог ли послеслог ,где необходимо

George has never leraned to play ... banjo ... this day. He tried to play it  ... Sunday evenings , while we were  up River Thames,to get ... little  practice ,but it was never ... success. So he determined to postpone  the study  of banjo ... we reached ... Bath.But he  seemed  to lose ... heart in ... business.The once he tried  practising ... night round Leicester Square but ... inhabitants complained ... the police ... it

атомный ледокол, развивая мощность 32,4 МВт, прошел во льдах путь 20 км за 5 ч. Определите среднюю силу двигателей ледокала?

ABCD-параллелограмм AD=12 см AB=20 см <B=150* S abcd- ?