Giải
n=1
Vì 7/1+9=7/10;8/1+10=8/11;...;100/1+102=100/103.
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Các câu hỏi tương tự
cho cac phan so 6/n+8; 7/n+9; 8/n+10;.....; 64/n+66; 65/n+67
Tim so tu nhien n nho nhat de cac phan so tren toi gian
tim so tu nhien nho nhat de cac phan so sau toi gian :
5/n+6;6/n+7;7/n+8;...........;31/n+32
1.Tinh gia tri bthuc:
A=1+3+5+...+19/21+23+25+...+39
2.Tim so tu nhien x,biet:
(5^x)*(5^x+1)*(5^x+2)=
1000000000000000000:2^18
3.1CMR:so viet boi 27 chu so giong nhau thi chia het cho 27
2.tim so n co 4 chu so,biet n la so chinh phuong va n chia het cho 147
4.Tim so tnhien n nho nhat de cac phan so sau deu toi gian:
7/n+9; 8/n+10; 9/n+11;...........;100/n+102
tim so tu nhien n de phan so sau day toi gian
a)3/n,5/n,12/n (n nho nhat)
b)5/n+8;6/n+9;7/n+10
tim phan so toi gian nho nhat co tu va mau la cac so tu nhien sao cho khi nhan phan so do lan luot voi cac phan so 10/7;5/6;15/9 thi moi tich tim duoc la so tu nhien.
tim n de cac cac phan so sau la phan so toi gian
\(\frac{n+7}{3};\frac{n+8}{4};\frac{n+9}{5};\frac{n+10}{6};\frac{n+11}{7}\)
tim tat ca cac so tu nhien n de phan so n+3/n -12 la phan so toi gian
tim cac so tu nhien n khac 0 de cac phan so sau la phan so toi gian
7/n-3
n+7/n+2
2n+16/n+5
3n+4/n3
tim cac so tu nhien n de cac phan so sau viet duoc duoi dang phan so thap phan:a,n+2/300 b,11.(n-1)/924