Các câu hỏi tương tự
CM 11...1( 100chu so 1) - 22...2(50chu so2) LA SO CHINH PHUONG
cho A= 2^0 +2^1+2^2+.....+2^2017
a,A co la so chinh phuong ko
b,A+1 co la so chinh phuong ko
tim so tu nhien lon hon 0 sao cho tong
1!+2!+...+n! la so chinh phuong
b)tim 1 so co 4 chu so sao cho so do vua la s chinh phuong vua la so lap phuong
a) cho A = 1+3+5+7+...+(2n+1) Voi n thuoc N
chung to rang A la so chinh phuong
b)B=2+4+6+8+...+2n voi n thuocN
so B co phai la so chinh phuong ko
a) cho A = 1 + 3 + 5 + 7 +......+(2n + 1) Voi n thuoc N
chung to rang A la so chinh phuong
b) cho B = 2 +4+6 + 8 + ....+ 2n Voi n thuocN
so B co the la chinh phuong ko
chung minh rang neu a,b la tong cua2 so chinh phuong thi ab cung la tong cua 2 so chinh phuong
neu a la so gam 200 chu so 1 va B la so gom 100 chu so 2 CMR A-B la so chinh phuong
Cho a,b la 2 so chinh phuong le lien tiep.Cmr (a-1).(b-1) chia het cho 192
tim so tu nhien n de 2^8+2^11+2^n la so chinh phuong
A 11 B 9 C12 D10