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Y
❤ ~~ Yến ~~ ❤
18 tháng 4 2021
Đúng(1)
Những câu hỏi liên quan
18 tháng 9 2021
\(a,\widehat{A}=\widehat{CAB}=123^0\left(đối.đỉnh\right)\\ \widehat{CAB}+\widehat{ABD}=123^0+57^0=180^0\)
Mà 2 góc này ở vị trí TCP nên \(a//b\)
\(b,\left\{{}\begin{matrix}a//b\\a\perp d\end{matrix}\right.\Rightarrow b\perp d\)
DT
2
KD
16 tháng 12 2016
-bản vẽ kĩ thuật gọi tắt là bản vẽ .trinh bày các thông tin kĩ thuật của sản phẩm.dưới dạng các hình vẽ và các kí hiệu theo quy tắc thống nhất và thường vẽ theo tỉ lệ.
-dùng trong lỉnh vực cơ khí;nông ngiệp;điện lực;kiến trúc quân sự;giáo tiếp
-mỗi lĩnh vực kĩ thuật đều có loại bản vẽ của nghành mk
mk soạn như vậy đó...hihi
NV
Nguyễn Việt Lâm
Giáo viên
5 tháng 5 2021
\(a=\lim\limits_{x\rightarrow-3}\dfrac{x+3}{\left(x+3\right)\left(x-3\right)}=\lim\limits_{x\rightarrow-3}\dfrac{1}{x-3}=-\dfrac{1}{6}\)
\(b=\lim\limits_{x\rightarrow2}\dfrac{\left(x+3\right)\left(x-2\right)}{\left(x-2\right)\left(x+2\right)}=\lim\limits_{x\rightarrow2}\dfrac{x+3}{x+2}=\dfrac{5}{4}\)
\(c=\lim\limits_{x\rightarrow4}\dfrac{\left(x-4\right)\left(x+4\right)}{\left(x+5\right)\left(x-4\right)}=\lim\limits_{x\rightarrow4}\dfrac{x+4}{x+5}=\dfrac{8}{9}\)
\(d=\lim\limits_{x\rightarrow2}\dfrac{\left(x-2\right)\left(x+2\right)}{\left(x-1\right)\left(x-2\right)}=\lim\limits_{x\rightarrow2}\dfrac{x+2}{x-1}=4\)
\(e=\lim\limits_{x\rightarrow2}\dfrac{x+7-9}{\left(x-2\right)\left(\sqrt{x+7}+3\right)}=\lim\limits_{x\rightarrow2}\dfrac{x-2}{\left(x-2\right)\left(\sqrt{x+7}+3\right)}=\lim\limits_{x\rightarrow2}\dfrac{1}{\sqrt{x+7}+3}=\dfrac{1}{6}\)
\(f=\lim\limits_{x\rightarrow1}\dfrac{x+3-4}{\left(x-1\right)\left(\sqrt{x+3}+2\right)}=\lim\limits_{x\rightarrow1}\dfrac{x-1}{\left(x-1\right)\left(\sqrt{x+3}+2\right)}=\lim\limits_{x\rightarrow1}\dfrac{1}{\sqrt{x+3}+2}=\dfrac{1}{4}\)
\(h=\lim\limits_{x\rightarrow-3}\dfrac{x+7-4}{\left(x+3\right)\left(\sqrt{x+7}+2\right)}=\lim\limits_{x\rightarrow-3}\dfrac{x+3}{\left(x+3\right)\left(\sqrt{x+7}+2\right)}=\lim\limits_{x\rightarrow-3}\dfrac{1}{\sqrt{x+7}+2}=\dfrac{1}{4}\)
MN
5 tháng 5 2021
Bài 1:
a,
= limx->-3 \(\dfrac{x+3}{\left(x+3\right)\left(x-3\right)}\)
= limx->3 x-3
= -3 -3
= -6
b,
= limx->2 \(\dfrac{\left(x-2\right)\left(x+3\right)}{\left(x-2\right)\left(x+2\right)}\)
= limx->2 \(\dfrac{x+3}{x+2}\)
= \(\dfrac{5}{4}\)
c,
= limx->4 \(\dfrac{\left(x-4\right)\left(x+4\right)}{\left(x-4\right)\left(x+5\right)}\)
= limx->4 \(\dfrac{\left(x+4\right)}{\left(x+5\right)}\)
= \(\dfrac{8}{9}\)
d,
= limx->2 \(\dfrac{\left(x-2\right)\left(x+2\right)}{\left(x-2\right)\left(x-1\right)}\)
= limx->2 \(\dfrac{\left(x+2\right)}{\left(x-1\right)}\)
= 4
NT
2
15 tháng 11 2017
Pho is one of the Vietnamese traditional food. The most delicious and typical brand of Pho in Vietnam is Ha Noi Pho with wonderful flavor. Pho is made from rice noodles, beef or chicken and other spices. Pho is a noodle soup; therefore, it’s better when being added with beansprout. Eating Pho with family not only reflects Vietnamese tradition but also creates cozy atmosphere. At weekends, my friends and I usually go to a cafeteria to enjoy Pho because Pho is served at many restaurants in Vietnam. There are two main kind of Pho: noodle soup with beef and sliced chicken, both of them are delicious and high nutrients. Pho is favorite food of almost Vietnamese and often served as breakfast. Moreover, Pho is popular in international market for its pleasant taste and reasonable price. Foreign tourists visit Vietnam and they really like the taste of Pho here. I am very proud of it. In near future, I hope Pho will be more famous in other countries so that foreigners can enjoy this cuisine and understand about Vietnamese culture.
AR
15 tháng 11 2017
Around the world there are many cuisine but I still like spaghetti the most. The main ingredients to make spaghetti are noodles, beef and tomatoes. Besides, we can add onion, carrot, bean or other kind of vegetable. At weekends, my mother and I usually go to the market, buy goods and cook spaghetti for my family instead of traditional dishes. It’s easy to cook this food. All we have to do are boiling noodles, chopping beef and making a good sauce of tomatoes. There is a tip for a perfect sauce is adding a slice of lemon into it. If there is a need of vegetable, It can be served with carrot and peas. Spaghetti supplies high nutrients and several vitamins, which good for your health especially for diet people. Moreover, spaghetti is famous for its delicious taste and convenience as fast food. It’s known as typical traditional food of Italy. Although spaghetti originate from Europe, it’s more widespread in Asia specifically Vietnam. Nowadays, It is popular food not only in Italy but also in other countries.
10 tháng 4 2021
2:
uses crt;
var a:array[1..30]of integer;
i,dem:integer;
begin
clrscr;
for i:=1 to 30 do
begin
write('A[',i,']='); readln(a[i]);
end;
dem:=0;
for i:=1 to n do
if a[i] mod 5<>0 then inc(dem);
writeln('So phan tu khong chia het cho 5 la: ',dem);
readln;
end.