= 978

tich nha bạn

110+120+130+140+150+160+170+180+190+200

=(110+200)+(120+190)+(130+180)+(140+170)+(150+160)

=310+310+310+310+310

=310 nhân 5

=1550

Tick tớ nha! Tớ đầu tiên đấy

Choose the letter A, B, C or D to complete the passage below

A composer is someone who ________ (6) and directs original music used to produce various types of media entertainment. The scores written need ________ (7) technically correct in order to create flawless performances by choruses, musicians or instrumental ensembles. Sound recordings produced from the score vary ________ (8) style and may reflect the classical, country, folk, jazz, techno or pop genres. A composer's job is to help ________ (9) a story in a film, television story, play or video game without ________ (10) the viewer. The soundtrack they create must suit the project ________ (11) convey the appropriate mood and tone.

Successful composers are versatile with ________ (12) collaboration skills, allowing them ________ (13) on a variety of projects with producers and musicians from various backgrounds. They have extensive knowledge of the industry and a passion and talent ________ (14) creating sound recordings. Most composers are often skilled in playing one or multiple instruments and ________ (15) a good ear for music.

Question 12:

A. effective

B. effect

C. effects

D. effectively

Ai giai giup toi voi nao

Ta có: 2x+x²>0 => x(x+2)>0 => x>0 hoặc x+2>0 => x>0 hoặc x>2 => x>2

Vậy BPT có nghiệm x>2

a, Xét \(\Delta\)HBC và \(\Delta\)KCB, ta có:

\(\widehat{HCB}=\widehat{KBC}\) (\(\Delta\)ABC cân tại A)

BC chung

\(\widehat{HBC}=\widehat{KCB}\) (\(=90^0-\widehat{HCB}=90^0-\widehat{KBC}\))

\(\Rightarrow\) \(\Delta\)HBC = \(\Delta\)KCB (g.c.g) \(\Rightarrow\) BK = CH

b, Xét \(\Delta\)ABC và \(\Delta\)AKH có:

\(\widehat{A}\) chung

\(\dfrac{AB}{AK}=\dfrac{AC}{AH}\) (AB=AC và AK=AH)

\(\Rightarrow\) \(\Delta\)ABC \(\sim\) \(\Delta\)AKH

\(\widehat{ABC}=\widehat{AKH}\)

KH // BC (đồng vị)

c, Theo c/m phần b, ta có:

tính nhanh hay tính

dễ

ông thọ

Are you killed me...

63.17+18.34+17=17.(63+1)+18.34=17.64+18.34=1088+612=1700