Предмет: Алгебра, автор: nadinskaya95

3 ^ (x ^ 2 - x) = 9

2 ^ (x - 1) + 2 ^ (x + 2) = 36

25 ^ x + 10.5 ^ (x - 1) - 3 = 0

2^ x *5^ x+2 =2500

Ответы

Автор ответа: guldanaerekeeva844
1

Ответ:

Ответ. 1. 2^(x-1) + 2^(x+2) = 36; 4,5*2^x=36; 2^x=8; x=3;

2. 25^x + 10*5^(x-1) - 3 =0;5^(2*x)+2*5^x-3=0; (5^x+3)*(5^x-1)=0; x=0;

3. 2^x * 5^(x+2) = 2500; 25*10^x=2500; 10^x=100; x=2

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Part I
Mrs. Pepperpot is a funny fragile woman who at some moments becoms as small as a pepperpot. She never knows when it can happen but she feels when she is going to be her normal size again. Mrs. Pepperpot is married. Her husband, Mr. Pepperpot, is a sportsman. He has been going in for sports for many years and is good at winter and summer sports. The Pepperpot live in Norway. They are fond of growing vegetables in their greenhouse and travelling all over the world.
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Mrs. Pepperpot suffered a little from the changes in the climate. She was used to warm summer afternoons and cool evenings of her native country where you always breathe in fresh air and feel active, but she enjoyed her holiday. The Pepperpots stayed out a lot and Mr. Pepperpot even slept out.
When they came home it was autumn in Norway. The days became shorter. The weather got changeable. It started raining. It often snowed. Soon real winter began. Winter had always had a great influence on Mr. Pepperpot. He was fond of taking part in different winter sports competitions. Thus as usual, he decided to go in for the local ski race. He had been a pretty good skier when he was young, so he said to Mrs. Pepperpot, "I do not see why I should not have a go this year; I feel much better than I have for many years."
"That is right, husband, you do that," said Mrs. Pepperpot, "and if you win the cup, you will get your favourite cake when you come home."
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"Oh, my!" exclaimed Mrs. pepperpot. "Now I shall have to go after him or his skis will not go forward and there will ve no cup in this house today. The day will be ruined for Mr. Pepperpot." So, Mrs. Pepperpot ran up the road as fast as she could with the can of wax.
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