Предмет: Алгебра, автор: virKuzmich

Подскажите пожалуйста, как решить задачу по алгебре для 11-го класса?

Седьмой член геометрической прогрессии в 5 раз больше ее пятого члена.Найдите отношение

первого и сто первого членов прогрессии

Ответы

Автор ответа: Аноним

b7 = b1q^6
b5 = b1q^4
(b1q^6)/(b1q^4) = 5, ⇒ q^6/q^4 = 5, q² = 5
b101 = b1q^100
b1/(b1q^100) = 1/q^100 = 1/(q²)^50 = 1/5^50

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: puzakovaanastasiya

My favourite room at the moment ia our study which is the big gest room in the house. It is full of wonderful things: books, pietures eollections of colnn and stamps, a video and a computer. There is a very old writing table in the study. My great-granddad bought it at the beginning of the century when he was a student. It's very un- Usual. There is a sofa in the corner of the room and next to It juat at the walla beautiful old standard lamp, which is on the carpet. I ciean the carpet with the vacuum eleaner very often on my helping t the house day. There isa piano near the window. At night, when it gets dark. ike to turm off the tight, turn on the standard lamp and piny the plano. When the standard lamp is on, the study looks like a little fairy land. I often sit in the old armehair and dream. My favourite room is the one where I play my musie. I have got a very good stereo system. That's my hobiby. This room is good. But I have a problem. There is no central heating in it, and it ie the coldest room in winter. I can never get warm enough with the fire. And another thing that ja wrong with it is that there is a very big window there. In sammer, when it's very hot. I can't open it because my neighbours don't like Joud musie, and it's all out in the street when I play my favourite muaie with the window open. 1. Answer the questions 1) What is there in the pietures that you can't find in the texta? 2) Who often sits in the old armehair and dreams? 3) Which room la cold? 4) Whose room is the bent in your eeinion? 2. Say what Nelly and Bob like (dislike) about their favourite rooms. 3. Speak about your favourite room. Помогите пожалуйста!

7 лет назад

Предмет: Математика, автор: islamismailov480

115.10 46 · 100 1 000 .7
1 000 .7 29.10
100 - 14 200 · 10 10 • 10 100 . 10
Используй правила умножения 10, 100, 1 000 на
другое число. Помогите пожалуйста

7 лет назад

Предмет: Музыка, автор: emjenek15

Кому посвятил свой фортепианный концерт №2 Сергей Рахманинов?

7 лет назад

Предмет: Алгебра, автор: zwezdinatanya

Из пункта А в пункт В, расстояние между которыми25 км, одновременно выехал автобус и автомобиль. Во время пути автомобиль сделал остановку на 2 мин, но в пункт В приехал на 3 мин раньше автобуса. Найдите скорость автомобиля, если скорость автобуса в 1,2 меньше скорости автомобиля.

10 лет назад

Предмет: Литература, автор: tanusha55000

Можно краткое содержание примерно от 4 до 10 предложений двенадцать месяцев С Маршак

10 лет назад