giúp mik,mik tick
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NN
0
12 tháng 10 2021
a, Áp dụng t/c dtsbn:
\(\dfrac{a}{b}=\dfrac{c}{d}=\dfrac{a+c}{b+d}\)
b, Áp dụng t/c dtsbn:
\(\dfrac{a}{b}=\dfrac{c}{d}=\dfrac{2021a}{2021b}=\dfrac{2021a-c}{2021b-d}\)
c, Ta có \(\dfrac{a}{b}=\dfrac{c}{d}\Rightarrow\left(\dfrac{a}{b}\right)^2=\left(\dfrac{c}{d}\right)^2\)
Áp dụng t/c dtsbn:
\(\left(\dfrac{a}{b}\right)^2=\left(\dfrac{c}{d}\right)^2=\dfrac{a^2}{b^2}=\dfrac{c^2}{d^2}=\dfrac{a^2+c^2}{b^2+d^2}\)
PN
3
17 tháng 11 2021
A: Oh! Look at that house, it's so beautiful.
B: Yes, It's C's house. It's bigger than my house and yours, too.
C: Hello guys, what are you talking about?
B: We are talking about your house. Uhm...Hey C, How many rooms are there in your house?
C: There are 10 rooms in my house and a big garden behind its.
A: Is it expensive?
C: Yeah, It's nearly 1,5 billions.
A: OMG, your house is more expensive than mine. My house only need about 1 billions to buy it!
B: Your house looks like very convinient.
C: You are right. Do you see our school? It takes me 5 mins to walk to school, so it's the reason why I never late for school.
A: Really? I have many things not as well as you.....
B: It's ok A. You can have it when you learn better than now
17 tháng 11 2021
Có gì sai sót bạn cứ nói nhé, mình chỉ kịp nghĩ ra đúng đủ 12 câu thôi bạn ạ :)))))
C
3
CB
12
7 tháng 8 2018
khongcamxuc_123 đó nha bn bn phải giữ lời hứa đấy nha
~~~~ hok tốt ~~~~!!!!
TB
vẽ giúp mik 1 ngôi nhà nha [ ko chép mạng ] vẽ xấu mik cx tick mà vẽ đẹp mik cx tick ! mik cần gấp !
12
13 tháng 10 2021
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I I
I @ @ I
I I
I I __________ I I
I I @ I I
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I___________ I________ _I_________I_^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
BAO NHIÊU CÔNG SỨC VẼ NHÀ TRÊN MÁY TÍNH CỦA MK ĐÓ, ỦNG HỘ MK NHA!!!!
Vì đây là hình lập phương nên mặt nào cũng sẽ là 1 hình vuông với cạnh là 8(m)
Diện tích mỗi mặt:
8 x 8=64(m2)
64
64
64