Предмет: Алгебра, автор: ValeDoka

(1/5)^(2*x)+(1/5)^(x-2)-26<0

Ответы

Автор ответа: Tollluk

Условие: (1/5)^(2*x)-(1/5)^(x-2)-26<0
Решение: (1/5)^(2x)-((1/5)^x)/(1/5)^2-26<0
(1/5)^x=t
⇒ t²-25t-26<0
(t-26)(t+1)<0
-1<t<26
-1<(1/5)^x<26
log(1/5)26<x
Ответ: x> log(1/5)26 , тогда только с логарифмом...

Автор ответа: Tollluk

Простите. глупость написал..

Автор ответа: Tollluk

опять глупость(

Автор ответа: ValeDoka

извиняюсь, свой косяк нашел: перед вторым членом минус (1/5)^(2*x)-(1/5)^(x-2)-26<0 :-(( А так решаемо?

Автор ответа: Tollluk

решил... но тут только логарифм тогда.

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: makszhivotovskij07

Read the web article about overland truck holidays in Africa and complete the notes. Write no more than four words or numbers from the article in each gap. Mind your spelling.
Travelling on an Overland Truck across Africa
The key thing to remember when travelling overland in Africa is to expect the unexpected! If you’re someone who requires a fixed itinerary with no surprises, then this won’t be the kind of trip for you. We sometimes have to change our travel plans due to unforeseen circumstances. But this is what makes every trip different and exciting. As part of this adventure, we expect you to play an active role in the daily running of your trip, to get stuck in and work as a team, helping out with tasks like cooking meals over open fires, pitching tents and cleaning and tidying the truck.

On driving days, we travel 100-600 km, depending on the terrain. We aim for one long driving day followed by several short ones. We have some non-driving days, when you can relax and enjoy sights like Lake Malawi or Victoria Falls. Most nights are spent at campsites, where you can shower, have a cold drink etc., but we sometimes camp in the bush, experiencing the “real” Africa. We provide generous sized tents (shared with one other) and thick camping mats, which by all accounts are comfortable (all you need is a sleeping bag and a mosquito net).

Your day begins at 7am with a simple ‘help yourself’ breakfast. For other meals, you’ll be expected to muck in and do your bit. When ‘on the road’ or at campsites, you will use a rota system and cook in groups with 2-3 others using gas or open fires. Expect to cook once every 7-10 days, depending on the size of the group. Occasionally there will be some stores of food on the truck for you to use, but it’s your job to decide what to cook and shop for most of your ingredients in local markets and shops. We do NOT cater for fussy eaters, or carry special food items. So be warned!

If you’re not cooking, the early part of the evening will be spent putting up your tent with your ‘tent buddy’. Most crucially, you’ll collect firewood before lightening the fire and making hot drinks. Water is collected from the local wells where available. Then you can chill out and enjoy the evening. We have lights in the truck so you can read or write a journal if you wish. It would be a shame if you didn’t keep a record of the holiday of a lifetime!

Occasionally ___ mean that the planned itinerary has to be altered.

The ___ determines the distance that is covered each day.

People say that the camping mats are ___.

You are likely to cook with ___ people.

The majority of the food for meals comes from ___.

For non-cooks an important evening task is to find ___.

The holiday company encourages you to ___ of your holiday.

6 лет назад

Предмет: Английский язык, автор: GASTEMAN

ПОМОГИТЕ ПЖПЖПЖПЖПЖПЖ
2. Поставить глагол в скобках в нужной форме
1)Ann (water) flowers in her room today.
2)My mother (do) the shopping this week.
3)The children (clean up) the room this week.
4)The boy (play) the guitar for a month/
5)She (dance) since she was 6.

6 лет назад

Предмет: Физика, автор: mirhakimovulugbek

Утром автобус вышел на маршрут и вечером вернулся на ту же автобазу. Показание счётчика увеличилось на 500 км. Определите путь L и перемещение s автобуса ( км )

6 лет назад

Предмет: Математика, автор: anton101

у бори 80 рублей.он потратил 1/4 этих денег на мороженое,а 1/3 остатка-на апельсины.сколько денег осталось у бори

10 лет назад

Предмет: История, автор: Ния47

Ответьте на вопросы:

1) Сравните внешнеполитический курс И.В. Сталина после окончания Второй мировой войны и международную политику, проводимую Н. С. Хрущевым. Какие новые черты этой политики можно отметить?

2) Можно ли считать провозглашенный курс на мирное сосуществование отказом СССР от "холодной войны"?

3) Назовите и охарактеризуйте наиболее значимые проблемы внешней политики СССР 1945-1964гг.

4) Раскройте связь кризисных явлений в ряде стран Восточной Европы с внутриполитическим событием в СССР.

10 лет назад