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Đây là online math mà coi chừng bị trừ điểm hỏi đáp hoặc nặng hơn là bị khóa nick đó
Ai thấy mk nói đúng thì k mk nha
1. expensive
2.are delicious
3. has words of portuguese
4.send to he a card
5.reach the top shelf
6.very good/well
7.to go to my party
8.fascinated me
9.not go out
10.him here
11.selfish, I will like him
12.easy when I expected
13. win, I will be/become famous
14 was arrested by the police last week
15. want the job,I will apply for it
a) \(-6.\left(-\frac{2}{3}\right).0,25\)
\(=-6.\left(-\frac{2}{3}\right).\frac{1}{4}\)
\(=4.\frac{1}{4}\)
\(=1.\)
b) \(-\frac{15}{4}.\left(-\frac{7}{15}\right).\left(-2\frac{2}{5}\right)\)
\(=-\frac{15}{4}.\left(-\frac{7}{15}\right).\left(-\frac{12}{5}\right)\)
\(=\frac{7}{4}.\left(-\frac{12}{5}\right)\)
\(=-\frac{21}{5}.\)
c) \(\left(-0,4\right)^2-\left(-0,4\right)^3.\left(-3\right)\)
\(=0,16-\left(-0,064\right).\left(-3\right)\)
\(=0,16-0,192\)
\(=-0,032.\)
Chúc bạn học tốt!
The length is: 3/4 + 1/12 = 5/6km
Area of land is: 3/4 . 5/6 = 5/8km2
a) A min \(_{\Leftrightarrow}\) \(\dfrac{1}{x-3}\) đạt GTNN \(\Leftrightarrow\) x-3 lớn nhất mà x \(\in Z\) nên x bất kì sao cho càng lớn là đc (vô lý) xem lại đề
1 :\(\frac{7}{20}\)
2 \(\frac{1}{4}\)
3 \(\frac{23}{2}\)
4 2187
5 64
6 x=16
7 x=\(\frac{-1}{243}\)
8 mϵ∅
cho mình hỏi cài này là j vậy
Đề 2
1) \(\frac{7}{20}.\)
2) \(\frac{1}{4}.\)
3) \(\frac{23}{2}.\)
4) \(2187.\)
5) \(64.\)
6) \(x=16.\)
7) \(x=\left(-\frac{1}{3}\right)^5\)
8) \(m\in\varnothing.\)
Chúc bạn học tốt!
Bài1:
Ta có:
a)\(\sqrt{\dfrac{3^2}{5^2}}=\sqrt{\dfrac{9}{25}}=\dfrac{3}{5}\)
b)\(\dfrac{\sqrt{3^2}+\sqrt{42^2}}{\sqrt{5^2}+\sqrt{70^2}}=\dfrac{\sqrt{9}+\sqrt{1764}}{\sqrt{25}+\sqrt{4900}}=\dfrac{3+42}{5+70}=\dfrac{45}{75}=\dfrac{3}{5}\)
c)\(\dfrac{\sqrt{3^2}-\sqrt{8^2}}{\sqrt{5^2}-\sqrt{8^2}}=\dfrac{\sqrt{9}-\sqrt{64}}{\sqrt{25}-\sqrt{64}}=\dfrac{3-8}{5-8}=\dfrac{-5}{-3}=\dfrac{5}{3}\)
Từ đó, suy ra: \(\dfrac{3}{5}=\sqrt{\dfrac{3^2}{5^2}}=\dfrac{\sqrt{3^2}+\sqrt{42^2}}{\sqrt{5^2}+\sqrt{70^2}}\)
Bài 2:
Không có đề bài à bạn?
Bài 3:
a)\(\sqrt{x}-1=4\)
\(\Rightarrow\sqrt{x}=5\)
\(\Rightarrow x=\sqrt{25}\)
\(\Rightarrow x=5\)
b)Vd:\(\sqrt{x^4}=\sqrt{x.x.x.x}=x^2\Rightarrow\sqrt{x^4}=x^2\)
Từ Vd suy ra:\(\sqrt{\left(x-1\right)^4}=16\)
\(\Rightarrow\left(x-1\right)^2=16\)
\(\Rightarrow\left(x-1\right)^2=4^2\)
\(\Rightarrow x-1=4\)
\(\Rightarrow x=5\)
1, Mount Everest is ……the………… highest mount in the wall.
2, I would like to buy ………a……… new clothes but I haven’t ……the………… money.
3, Are there ………a……… letters for me today?
Yes, there is only one from New York.
4, I have got ……a………… little money left, let’s have dinner in …………the…… restaurant.
5, My mother goes to …the…………… church in …………the…… morning and …the…………… afternoon goes to visit ………the……… friends.
6, It takes me half ……a………… hour to get to work by ………a……… bus.
7, What does ………the……… post office sell apart from stamps?
8, I want to buy …an…………… envelope and …………the…… fifty thousand dong phone card.
9, Viet would like to send his sister in ………the……… USA ………a……… letter.
10, Go along this road and take ………the……… second turning on ………the……… left.
Điền a/an/the hoặc some :
1, Mount Everest is ……the……… highest mount in the wall.
2, I would like to buy ………some……… new clothes but I haven’t ………the……… money.
3, Are there ………some……… letters for me today?
Yes, there is only one from New York.
4, I have got ………a……… little money left, let’s have dinner in ……the………… restaurant.
5, My mother goes to ………the……… church in …………the…… morning and ………the……… afternoon goes to visit ………the……… friends.
6, It takes me half ………a……… hour to get to work by ………ko dien……… bus.
7, What does ………the……… post office sell apart from stamps?
8, I want to buy ………an……… envelope and ………the……… fifty thousand dong phone card.
9, Viet would like to send his sister in ……the………… USA ……a………… letter.
10, Go along this road and take ……the……… second turning on ………the……… left.