Thuc hien phep tinh bang cach tinh nhanh :

a) 4/9 + 3/2 + 6/36. 

b) 2/7 x 5/17 + 12/7 x 15/17.

c) 2,34 + 5,18 + 7,66.

d) 7/11 : 3/4 + 7/11 : 1/4.

GIUP MINH MINH DANG CAN GAP.

Tim x :

a ) 5x  - 1 = 13

b ) ( x - 2 ) = 0

c ) 5 ( x - 7 ) + 8 = 0 

d ) ( x - 19 ) * 4 = 36

e ) 3 ( x - 7 ) - 2 = 4

Giup minh voi ! Minh dang can gap lam !

BAI 1 TINH

x ^ 2 . x - 2x^3

6 x^2 y . 3 xy - 2y ^2 .x +y

4x^2 + 5x -1  . 2x^3 - 3x

- 8 x^3y + 2 y^4 . 3xy^3 - 2 x^4 + 7y ^4

CAC BAN OI GIUP MINH NHE MINH DANG CAN GAP

tinh nhanh

( 1 + 3 + 5 + 7 + .... + 2003 + 2005) x ( 1212 x 27 - 2727 x 12)giup minh voi minh dang can gap lam

nhanh len nha 

cam on truoc

1.Tinh gia tri phan so

2 x 3 x 4 x 6 + 4 x 18 + 4 x 54 + 18 x 36 / 2 x 3 x 5 + 2 x 45 + 10 x 27 + 18 x 45

2.Thay cac dau ? boi cac chu so va dau phep tinh thich hop

3?562?1  ?  ?6?023? = 7546?19

dau hoi o giua la dau phep tinh nha

co the loai tru duoc dau chia

ai dung minh se tick

minh can gap

tinh nhanh bieu thuc sau

a) x^6-20x^5-20x^4-20x^4-20x^3-20x^2-20x+1992 voi x= 21

b)x^7-26x^6+27x^5-47x^4-77x^3+50x^2+x+1989 tai x = 25

c)4029-2015x+2015x^2-....+2015x^2014-x^2015 tai x= 2014

d)A= (x-1/x-2015+x-2/x-2014+x-3/x-2013+....+x-2014/x-2+x-2015/x-1):(1/2 +1/3+1/4+....+1/2016) tai x=2016 dau / o day la phan do nha!!

xin nho cac ban giai giup cho minh! cam on nhieu!!!!!!!! minh dang can ket qua gap 

cho ham so y =f(x) = 4x+5

a, tinh f(-2,5); f (3) ; \(f\left(\dfrac{-3}{2}\right)\)

b , tim x khi f (x) = 2 ;f(x) =\(\dfrac{-1}{3}\) ; f(x) = 0

c, cac diem A (1;9);B (-2 ;3) ;C (3 ; 17); D(-3;7) diem nao thuoc do thi ham so

giup minh nhe minh dang can gap (luu y chi giai minh cau c ,cac cau khac minh lam roi)

Thuc hien phep tinh (Tinh nhanh neu co the)

18 x [ (3^4 x 24 + 3^4 - 27 x 3^4) - 71 x1^30 ] - 80

CAC BAN GIUP MINH VOI

a) 92/9 + 13/5 - 56/9 

b) 58/7 - (31/9 + 30/7)

c) 2/3 + 1/3 x 9/4 - 13/12

d) 41/8 - 7/4 : 11/5

e) 478/19 : 5/4 - 668/19 : 5/4

f) 32/21 x 49/45 : 16/22 x 15/33

g) 2020x2018+9 / 2019x2020-2011.

Giup minh voi minh dang can gap!!!