= -37. (12+21-36)

= -37.(-3)

=111

=-12x37-21x37+36x37

=37x(-12-21+36)

=37x3=111

D (chắc thế XD)

d

100000000000 ngày nha

Sai rồi

Ban nghĩ lại đi

31 If we had our key, we could get into the house

32 If I hadn't been busy working, I could have seen her off at the airport

33 If the house hadn't been expensive , they wouldn't have bought it

34 If You had listened to what I told you earlier, you wouldn't be asking these questions

35 I wish you turned down the radio

35 I wish I had said goodbye to everybody before I left

37 But for his brother's ingenious plan, the stranded climber wouldn't have been rescue

38 If you hadn't written the letter, we wouldn't have known what happened

9.8(6)

x-2/8=10.6:1.5

x-2/8=7.0(6)

x      =7.0(6)+2/8

x      =9.8(6)

`tan (1/2) ≈ 26^o 33'`

ai bảo thik hỏi nó cơ😀 😀 😀 😀 😀 😀

ngáo chó

sao chửi em hả chị linh

Đề yêu cầu điều gì em nhỉ?

ĐKXĐ:

a. \(sinx-1\ne0\Rightarrow sinx\ne1\Rightarrow x\ne\dfrac{\pi}{2}+k2\pi\)

b. \(cos3x+1\ne0\Rightarrow3x\ne-1\Rightarrow3x\ne\pi+k2\pi\)

\(\Rightarrow x\ne\dfrac{\pi}{3}+\dfrac{k2\pi}{3}\)

c. \(\left\{{}\begin{matrix}cos3x\ne0\\2cosx-1\ne0\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}3x\ne\dfrac{\pi}{2}+k\pi\\cosx\ne\dfrac{1}{2}\\\end{matrix}\right.\)

\(\Rightarrow\left\{{}\begin{matrix}x\ne\dfrac{\pi}{6}+\dfrac{k\pi}{3}\\x\ne\pm\dfrac{\pi}{3}+k2\pi\end{matrix}\right.\)

d. \(cos\left(4x-\dfrac{\pi}{3}\right)\ne0\Rightarrow4x-\dfrac{\pi}{3}\ne\dfrac{\pi}{2}+k\pi\)

\(\Rightarrow x\ne\dfrac{5\pi}{24}+\dfrac{k\pi}{4}\)