x = 36000000;3 = 12000000

bằng 6000

a) 0 b) 1 c) 200

a, 350 

b, 107

c, 200

từ lần sau đăng đúng lớp vào bn

ƯC(26,36)

Ta có 

26=2x13

36=2^2x3^

ƯCLN(25,36)=2

ƯC(26,36)=Ư(2){1;2}

BC(26,36)

Ta có 468

26=2x13

36=2^2x3^2

BCNN(26,36)=2^2x3^2x13=4x9x13=468

BC(26,36)=B(26,36)={0;468;936...}

có k nhá

ghép cặp vào ra 28 nha

Bằng 28.

Vậy mà cũng ko biết

a: \(\overline{xx}+\overline{x}+5=125\)

=>10x+x+x=120

=>12x=120

=>x=10

b: \(\overline{xxx}+\overline{xx}+x+x=992\)

=>100x+10x+x+10x+x+2x=992

=>124x=992

=>x=8(nhận)

c: \(4725+\overline{xxx}+\overline{xx}+\overline{x}=54909\)

=>100x+10x+x+10x+x+x=54909-4725

=>123x=50184

=>x=408

d: \(\overline{xxx}-\overline{xx}-\overline{x}-25=4430\)

=>100x+10x+x-10x-x-x=4430+25

=>99x=4425

=>x=4425/99(loại)

e: \(\overline{xxx}+\overline{xx}+\overline{x}+\overline{x}+\overline{x}+1=1001\)

=>111x+11x+3x=1000

=>125x=1000

=>x=8

f: \(35655-\overline{xxx}-\overline{xx}-\overline{x}=5274\)

=>35655-111x-11x-x=5274

=>35655-123x=5274

=>123x=35655-5274=30381

=>x=247

Lời giải:
Gọi tổng trên là $A$.

$A=11\times (\frac{5}{11\times 16}+\frac{5}{16\times 21}+\frac{5}{21\times 26}+....+\frac{5}{36\times 41})$

$=11\times (\frac{16-11}{11\times 16}+\frac{21-16}{16\times 21}+\frac{26-21}{21\times 26}+....+\frac{41-36}{36\times 41})$

$=11\times (\frac{1}{11}-\frac{1}{16}+\frac{1}{16}-\frac{1}{21}+\frac{1}{21}-\frac{1}{26}+...+\frac{1}{36}-\frac{1}{41})$

$=11\times (\frac{1}{11}-\frac{1}{41})=1-\frac{11}{41}=\frac{30}{41}$