tim x biet:3x+7chia het cho x-1
hay cho biet cach lam va ket qua
tim so tu nhien x biet : 5x+7chia het cho 3x+2
\(\left(5x+7\right)⋮\left(3x+2\right)\)
\(3\left(5x+7\right)-5\left(3x+2\right)⋮\left(3x+2\right)\)
\(15x+21-15x-10⋮\left(3x+2\right)\)
\(11⋮\left(3x+2\right)\)
\(\left(3x+2\right)\inƯ\left(11\right)=\left\{1;11\right\}\)
Mà 3x + 2 > 0 nên 3x + 2 = 11
Vậy x = 3
Tim so co 3 chu so abc biet a:b:c=1:3:2 va abc chia het cho 18
(Chu y abc co gach ngang o phia tren)
Mk biet qua nhung ko biet cach lam cac trinh bay chi tiet nha
ủa chs roblox hả cha=))))))?
tim x biet
h x^2-7chia het x+3
k 3x^2+5x+8 chia het x+1
m 20 chia het x+1
p 2x+7chia het x-2
n 3x+8 chia het 5x-7
(x+2/5)^3=(x+2/5)^3
biet ket qua nhung ko biet lam,cac ban lam giup ,ai dung va nhanh nhat minh tick cho
khong lam tin hay tim a trong cac phen tinh sau
a 95 x { a - 75 } = 95 x { 100 - 75 }
b } 2003 + a x 15 = 2003 x 10 x 3 x5
minh biet ket qua nhung khong biet cach trinh bay
a 95 x { a - 75 } = 95 x { 100 - 75 }
=>a-75=100-75
vậy a=100
b } 2003 + a x 15 = 2003 x 10 x 3 x5
a x 15 = 10 x 3 x5
a x 15 = 10x(3x5)
a x 15=10x15
Vậy a=10
tim n biet , A=n chia het n+1 B=6n-7 chia het n-2
tim x biet A=x-1/x-2 >0
ai tra loi nhanh va dung nhat se duoc 1 tich va ket bn nhe nhanh len minh can gap lam
A=n/n+1=(n+1)-1/n+1=n+1/n+1 -1/n+1
=1-1/n+1
de n chia het cho n+1
=)1 chia het cho n+1
=)n+1 thuoc Ư(1)
n+1 1 -1
n 0 -2
vay n =0;n=-2
Cho 6 chu so 1;2;3;5;7;9 tong cua tat ca cac so co 5 chu so khac nhau ma moi so deu chia het cho 5 lap duoc tu cac chu so tren
minh biet ket qua nhung khong biet cach lam
ai cha biet bang day nhung khong biet cach lam mat noi
tim so nguyen x biet :
3x+1 chia het cho 2x-1 va 3x=1 chia het cho x-1
Ta có : ( 3x - 1 ) chia hết ( 2x + 1 )
<=> 2.( 3x - 1 ) chia hết 2x + 1
<=> 6x - 2 chia hết 2x + 1
<=> 6x + 3 - 5 chia hết 2x + 1
<=> 3 . ( 2x + 1 ) - 5 chia hết 2x + 1
<=> 5 chia hết 2x + 1
Nên : 2x + 1 thuộc Ư ( 5 )
suy ra 2x + 1 thuộc { 1 , -1 , 5 , -5 }
Tim x thuoc Z biet:
a, |x-5|+x+3=16
b, |x-5|-7≥9
c, |x-4|>x+2
d, ||x+5|-4|=3
Lam nhanh ho minh
AI LAM NHANH VA CACH LAM DAY DU MINH SE TICK CHO
kHONG CAN LAM HET TAT CA CAC CAU