2*16>2^x>4
x=?
VERY DE GOOD LUCK
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PH
1
S
20 tháng 11 2015
Có: \(\frac{4x^2-6x-16}{x-3}=4x+6+\frac{2}{x-3}\)
Để (4x2 - 6x - 16) chia hết cho x - 3 thì \(\left(x-3\right)\inƯ\left(2\right)=\left\{1;-1;2;-2\right\}\)
Khi x - 3 = 1 => x = 4 (nhận)
khi x - 3 = -1 => x = 2 (nhận)
Khi x - 3 = 2 => x = 5 (nhận)
Khi x - 3 = -2 => x = 1 (nhận)
Vậy x = {1 ; 2 ; 4 ; 5} thì (4x^2 -6x-16) chia hết cho x - 3
10 tháng 3 2022
III. Choose the best answer.
1. She ____________________Ha Noi last week.
A. visits B. visiting C. visited D. visit
2. The food is very __________________.
A. long B. delicious C. noisy D. historic
3. Where do you __________________fishing?
A. play B. do C. go D. have
4. Many girls and women__________________ aerobics to keep fit.
A. play B. go C. do D. see
5. Hai can __________________ boxing well.
A. do B. play C. go D. have
6. The _____________tells people what is happening in Viet Nam and the rest of the world.
A. national B. cartoon C. game show D. 7 o’clock news
7. Big Ben is the most famous tower in __________________.
A. Viet Nam B. England C. America D. Australia
8. Thanh likes__________________ weather because he can go swimming.
A. hot B. cold C. rainy D. warm
GL
12 tháng 3 2022
1. The Songkran Festival is usually celebrated between 13 and 16 April.
➜ When is the Songkran Festival usually celebrated?
2. Vietnamese people go to pagodas at Tet to pray for a year of good luck and happiness.
➜ Why do Vietnamese people go to pagodas at Tet?
3. The Vietnamese celebrate Tet with family gatherings, traditional foods, and lion dances.
➜ What do Vietnamese people celebrate Tet with?
4. The festival site is three miles from the nearest town of Shepton Mallet.
➜ How far is the festival site far from the nearest town of Shepton Mallet?
5. During Tet, children and the elderly receive lucky money put in red envelopes.
➜ During Tet, who receive lucky money put in red envelopes?
6. Many people went to Han River to witness the Danang International Fireworks Festival.
➜ Where did people go to witness the Danang International Fireworks Festival?
7. Jean visits Dalat every two years to attend the Dalat Flower Festival.
➜ How often does Jean visit Dalat to attend the Dalat Flower Festival?
LH
Lê Huy Tường
VIP
12 tháng 5 2021
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216 > 2x > 4
Nên 216 > 2x > 22
Vậy 2 < x < 16
Nên x \(\in\) {3;4;5;6;7;8;9;10;11;12;13;14;15}