3+1.1+3
Những câu hỏi liên quan
giúp mình các bạn ơi (1999x1998+1998x1997)x(1.1/2-1.1/2-1.1/3)
tìm x biết :
1-(2x/3 +2)=-1.1/3
2/5x-1.1/2x+x=1/3
a) \(1-\left(\frac{2x}{3}+2\right)=-1\cdot\frac{1}{3}\)
\(1-\frac{2}{3}x-2=-\frac{1}{3}\)
\(-\frac{2}{3}x-1=-\frac{1}{3}\)
\(-\frac{2}{3}x=\frac{2}{3}\)
\(x=-1\)
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b) \(\frac{2}{5}x-1\cdot\frac{1}{2}x+x=\frac{1}{3}\)
\(\left(\frac{2}{5}-\frac{1}{2}+1\right)x=\frac{1}{3}\)
\(\frac{9}{10}x=\frac{1}{3}\)
\(x=\frac{1}{3}:\frac{9}{10}\)
\(x=\frac{10}{27}\)
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1.1+3+....+2n+1=n^2,
11^99-{1.1/3[5.2^3-(-7)^2+1/3+11^9.27^4-81^3-11^90]}
x×2+x×1/5=1.1/3
\(x\times2+x\times\dfrac{1}{5}=1.\dfrac{1}{3}\\ \Rightarrow x\times\left(2+\dfrac{1}{5}\right)=\dfrac{1}{3}\\ \Rightarrow x\times\dfrac{11}{5}=\dfrac{1}{3}\\ \Rightarrow x=\dfrac{5}{33}\)
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Tìm x,y,z biết 2x +1 =3y+3=5z-3 x-y+z=1.1
Tìm x,y,z biết 2x +1 =3y+3=5z-3 x-y+z=1.1
Thu gọn biểu thức sau :
S = 1.1! + 2. 2! + 3. 3! + ......... + 100 . 100!
Ta có:
S = 1.1!+2.2!+3.3!+.....+100.100!
S = (1+1-1).1!+(2+1-1).2!+...+(100+1-1).100!
S = 2!-1+3!-2!+4!-3!+...+101!-100!
S = 101!+(100!-100!)+(99!-99!)+...+(2!-2!)-1
S = 101!-1
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3x.(1/1.1/2+1/2.1/3+1/3.1/4+1/4.1/5+1/5.1/6)=3/4
11 tháng 6 2021 lúc 10:29
1.1. DẠNG I: Chia động từ *Mức độ nhận biếtExercise 1.1. Chess (play) …………………………………………………..by my grantfather everyday.2. Lan (give)……………………………………. a lot of gifts by her friends on her last birthday.3. This flowers (water) ……………………………………………by my father every morning.4. Fiona (invite)……………………………………………. to John’s birthday party last night.5. The dinner (prepare)……………………………………………… in the kitchen by her mother now.6. Our teeth should (clean)………………………………………………….. by us twice a day.7. The English gram...
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1.1. DẠNG I: Chia động từ
*Mức độ nhận biết
Exercise 1.
1. Chess (play) …………………………………………………..by my grantfather everyday.
2. Lan (give)……………………………………. a lot of gifts by her friends on her last birthday.
3. This flowers (water) ……………………………………………by my father every morning.
4. Fiona (invite)……………………………………………. to John’s birthday party last night.
5. The dinner (prepare)……………………………………………… in the kitchen by her mother now.
6. Our teeth should (clean)………………………………………………….. by us twice a day.
7. The English grammar (explain)……………………………………… by our teacher already.
8. The homework (do)…………………………………………………. by my daughter at this time yesterday.
9. Tom’s parents will (visit)……………………………………………….. by him next month.
10. The solution to this problem can (find)…………………………………………. by the scientists.
1 is played
2 was given
3 are watered
4 was invited
5 is being prepared
6 be cleaned
7 has been explained
8 was being done
9 be visited
10 be found
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