Bai 1
( 1/2 - 1 ) . (1/3- 1) . ( 1/4 - 1 )....( 1/2012 - 1 ) . ( 1/2013 - 1)
Bai 2 Tim tap hop cac so nguyen x thoa man cac dieu kien sau
a) 7/2 . 5/12 - 1 < x < 23/3 ÷ 7/3 + 5/7
b) -2240/6 x + 3 ÷ 5/3 la so nguyen
tim cac so nguyen n sao cho P=2n -1 / n-1 la so nguyen
tim tat ca cac so nguyen x so cho x^2+x-1 la so chinh phuong
cho x,y,z la cac so huu ti duong thoa man x+1/yz y +1/xz z+1/xy la cac so nguyen tim gia tri lon nhat cua bieu thuc A=x+y^2+z^3
Tim cac gia tri nguyen cua x de cac gia tri bieu thuc sau la so nguyen
a, 9-2x/x-3
b,3x-5/x-2
c,-3/4-x
B1. Cho f(1)=1008,f(1)+f(2)+...+f(n)=n^2.f(n) f(n)la ham so duong
tinh f(2015)
B2 Cho cac so nguyen to q,p,r,s sao cho cac so sau deu la so nguyen to p^s+s^q,q^s+s^r,r^s+s^p
tim cac so p,q,r,s
B3 co a,b,c duong a mu 3+bmu3=c^3
so sanh a^2015+b^2015 va c^2015
Tim a,b la cac so nguyen duong sao cho a+b^2 chia het cho a^2b-1
goi A la tap hp cac so nguyen duong x sao cho gia tri cua bieu thuc :\(\frac{2\sqrt{x}+3}{\sqrt{x}-1}\) nguyen
tim cac gia tri nguyen cua x de cac gia tri bieu thuc sau la so nguyen
a,9-2x/x-3
b,3x-5/x-2
c,-3/4-x
