Các câu hỏi tương tự
tim tat ca cac so nguyen duong x,y sao cho cac so x2+3.y va y2+3.x deu la so chinh phuong cua 1 so
CMR : neu a.b = c2 (a,b,c thuoc N*) va UCLN (a,b) =1 thi a va b deu la cac so chinh phuong
tim so ab biet :
2ab +1 va 3ab +1 deu la so chinh phuong
tim so tu nhien a sao cho a+593 va a-159 deu la so chinh phuong
tim chu so ab, biet
2ab+1 va 3ab+1 deu la so chinh phuong
tim so tu nhien co tinh chat:so do cong 25 va so do tru 12 deu co ket qua la so chinh phuong
1.Tren nua mp bo chua tia Ox,ve cac tia Ox1,Ox2,Ox3,...,OxN sao cho:
xOx2=2xOx1,xOx3=3xOx1,.......,xOxN=NxOx1.tim so N nho nhat de trong cac tia da ve co mot tia la tia phan giac chung cua 2017 goc
2.CMR:neu p la so nguyen to lon hon 3 va 2p+1 cung la so nguyen to thi 4p+1 la hop so
3.So sanh: 63^15 va 34^18
4.tim cac so tu nhien n co hai chu so biet:2n+1 va 3n+1 deu la so chinh phuong
5.CMR: S=16^5+2^15 chia het cho 33
neu co so tu nhien n sao cho k =n^2 thi ta noi so k la so chinh phuong tim tat ca cac so ab saocho (ab+ba) la so chinh phuong
tim m thuoc N sao cho m^2 + 2014 la so chinh phuong