cho n>2 , 2 mu n -1 nguyen to 

c/m 2 mu n +1 la hop so

tim so nguyen to p sao cho p mu 2 cộng p mu 4 cộng 1 cung la so nguyen to

tim m va n la so tu nhien biet a,2 mu m tru 2 mu n bang1984      

b;6 mu m chia 2 mu 1996 bang 3 mu n

2 mu m cong 2 mu n bang 2 mu m cong n tim m va n

Tim x,y la so nguyen 

a) 2x-3y+5= xy

b) x mu 2 +2xy+2x+4y

B2 Tim x,y la so nguyen to

x mu 2 -2y mu 2 =1 

B3 Tim so tu nhienx,y 

7 .(x-2004) mu 2 = 23- y mu 2

1.tim x thuoc n biet:

a)3 mu x .3             b)x mu 20 = x         c)2 mu x.16 mu 2=1024        d)64.4 mu x=16 mu 8

2.tim n thuoc n sao:

a)3 mu 2.3 mu n=3 mu 5              b)(2 mu 2:4).2mu n=4         c)32<2 mu n<128         d)2.16>_2 mu n>4

ai giai dung va nhanh minh tick cho

tim m, n

2016 mu m -18 mu n +2=0

n>2.CMR NEU N CHIA HET CHO 3 THI N MU 2 TRU 1 VA N MU 2 CONG 1 KO DONG THOI CUNG LA SO NGUYEN TO