2^x+2^x+1+2^x+2+...+2^x+2019=2^2021-4
2^x.(2^0+2^1+2^2+...+2^2019)=2^2021-4(1)
Đặt M=1+2+2^2+...+2^2019
M= 2^2020-1
Thay vào (1) a có
2^x.(2^2020-1)+2=(2^2020.2-1.2)
2^x =1
x =0
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Giải nghĩa từ Hán Việt thị trấn
file:///H:/My%20'SECRET'/FILE%20nghe%20ANH%208.mp3
ai giúp vs........................................
1. Mary (love) singing, so she (want) [wants to be a singer in the future. 2. Tom and his brother usually (take) their dog for a walk after breakfast. 3. What you (do) in your free time? 4. I think 10 years from now robots (be) part of our everyday life. 5. Thanks for letting me borrow your camera. I (send) it back to you tomorrow.
Giup em với mọi người em đang cần gấp 3 câu này ạ
Giúp mình với trước 18h (17/07/2021) hứa vote 5*
Fill in the blank with a suitable word FUNCTIONAL FOODS In the 21st century food will (1) ………..........…….more than just feed you. A new range of products appearing (2).......……………….. shelves in shops and supemarkets (3) ……................……. designed to give you specific health benefits. The demands of modern life make these foods very attractive. (4) …….............………..only do they provide proven ways to improve health, but they are also very attractive (5) …………........….a quick and convenient way of making sure we enjoy a healthy diet. In some countries it is already possible to buy crisps that make you feel (6) ………….depressed, chewing gum that increases your brain power and tea that helps you (7) …………………over tiredness associated (8) ……………long-distance air travel. (9) ……………..the future, experts promise biscuits that will keep your heart healthy, and hot chocolate drink to give you strong bones. (10) ……………the fact that these ‘functional’ foods cannot replace a balanced diet and regular exercise, they can help the body perform at (11) ………………. best a lot of the time. At (12) ……………….., these foods are more expensive than other foods, but that is due to the ingredients they (13) ………………of and the way they are made. All the foods contain probiotics (14) ……………increase the number of ‘good’ bacteria in your stomach, helping to keep your digestive system healthy. There may even (15) …… ………a functional food to protect eyesight, so keep an eye out as you never know (16) ………………. you might be eating tomorrow.
Giải giúp em với ai em k biết làm em cảm ơn cho em biết thì gì luôn ạ
Choose the best answer Without TV The most radical thing we have ever done is not have a TV in our house. Since 99.1 percent of American (households / housewives / holdalls / houseworks)1 .................cannot make this claim, it may be (at / for / of / in)2 .................some interest to know why. Certainly, our (shortage /lack/need/absence)3 .................of a television has created (large / big / high / great)4 .................curiosity, puzzlement , and anger (within / between / among / inside)5 .................the people we know, and I suspect even more of these (beliefs / emotions / opinions / thoughts)6 .................behind our backs. “If the Wetherells get (over / on / by / away)7 .................without a TV, why can’t we?” We did have a television during the first days of our marriage. I remember the dizzy way the (images / drawings / icons / movies)8 ……flickered across the screen. A few days later, after I (re-established / recovered / overcame / got)9 …..my senses, we took the set to our local dump, (waved / tightened / moved / shook)10 …… hands in satisfaction and have been without one ever (since / again / afterwards / before)11 …. . Now that my TV watching days are (past / behind / over / away)12…..me, I can afford to be nostalgic towards it all. I remember those nights when the whole family used to sit in the living room watching Ed Sullivan, one BT – Updatepower – Week5 (Grade 9) – July2021 (smooth/peaceful/ tender/soft)13……….light left on in the corner, laughing (at / for / with / by)14…..the comedians before the (announcements / publications / commercials / clips)15…… came on. Nevertheless, even warmer and more precious in memory will be these quiet, peaceful years with no TV at all.
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