34.3n=315
3n=315:34
3n=311
=>n=11
2n=4.128
2n=512
2n=29
=>n=9
3n=33.35
3n=38
=>n=8
2n.3=36 bn ghi lại đề này nha
34.3n=315
3n=315:34
3n=311
=>n=11
2n=4.128
2n=512
2n=29
=>n=9
3n=33.35
3n=38
=>n=8
2n.3=36 bn ghi lại đề này nha
ai trl dc mik tick cho nha
1¦ viet tap A cac so N n biet :
52/13 < n < hoac = 56/7
2¦ tim n thuoc N sao cho cac phan so co gt la so Z
a. n+6 : n
b n : n-3
3¦ tim 2 phan so co hieu bang 7 biet 1/3 so nho = 1/4 so lon
nhanh nha mik dang can
cho A=n+3\n-2 (n thuoc Z)
a) tim n de A la phan so
b) tim n de A thuoc Z
c) tim n biet A=-4
tim x thuoc n: 34.3^n :9=37
tim x thuoc n: 9<3^n<27
Tim chu so tan cung cua 360
hãy so sánh a=1+3+3^2+3^3+3^4+35+36 và B=37-1
Tim n thuoc N biet(n^2+13n-13)chia het cho (n+3)
(1+1/2)×(1+1/3)×(1+1/4)×....×(1+1/n)
Tim n biet n thuoc N va n lon hon hoac bang 2
tim n thuoc N* biet:
a, n^5+1 chia het cho n^3+1
b,n^3-n chia het cho n-3
c,n^3-3 chia het cho n-3
Tim n thuoc Z biet: n-3/2n+1
tim n thuoc Z biet :
(n-3) chia het cho (n-1)
cho btie thuc B bang 3+3 2+3 3 +...+3 2015
tim n thuoc N biet 2B +3 bang 3 n