\(4^2x+4^2.10=160\)
\(4^2\left(x+10\right)=160\)
\(16\left(x+10\right)=160\)
\(x+10=10\)
\(x=0\)
vay \(x=0\)
\(\left(12x-4^3\right).8^3=4.8^4\)
\(\left(12x-4^3\right).8^3-4.8^4=0\)
\(\left(12x-64\right).8^3-4.8^4=0\)
\(8^3\left(12x-64-32\right)=0\)
\(12x-96=0\)
\(12x=96\)
\(x=8\)
vay \(x=8\)
1.Cho x, y thuoc Z
Chung minh : 6x +11y chia het cho 31khi va chi khi: x+7y chia het cho 31
2.Cho x,y,z thuoc Z va x2 +y2=z2
Chung minh: xy chia het cho 12
Ai lam nhanh nhat minh se tich cho
Khong bat buoc lam het 2 cau
cau b -8 chia het x va 12 chia het x
cau c x chia het4 , x chia het -6 va -20 <x<-10
ai giup minh thi lam nhanh nha minh cam on truoc
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
Bai 8 : ****
Chung minh rang :neu 4 x abc + deg chia het cho 83 thi abc x deg chia het cho 83
Ai giai dc mk tang cho 2 like mk dang can rat gap mong cac bn giup do !
giup minh voi cac ban :
1timx
5^x-2-3^2=2^4-(2^8.2^4-2^10.2^2)
697:[(15^x+364):x]=17
134:(x-3)=35+160:5
(3.x-2^4).7^3=2.7^4
[(10-x) .2+5]:3-2=3
2 tim x thuoc N
cau a : n+5chia het n +1
cau b :2.n +7 chia het cho n-2
Tìm số tự nhiên x biết
a)(12x-43).83=4.84
b)(x-1)3=125
c)2x+2- 2x=96
khong thuc hien phep tinh hay cho biet chu so hang don vi cua moi ket qua sau
A, (2001+2002+2003+2004+..........+2007+2008+2009) - (21+32+43+54+......+98+119
)
B, (12+23+34+45+........+78+89+91) • 91•73•55•37•19
Chu y: ^•^ la nhan
Ai lam dung mk cho 2 tk viet ro CAU tra loi ko tom tat !!!
Rut gon cac bieu thuc sau:
a, (x+3)(x-4)-(x-1)(x+2)
b, a3+b3+3.a2.b+3ab2
Ai lam nhanh nhat va day du nhat thi to se tick cho
(Nho lam day du moi tick nhe,ko can lam het ca 2 cau ,biet lam cau nao thi lam cau do)
cmr a^2 -1 chia het cho 6 voi a ko chia het cho 3
lam dc 2 k