Các câu hỏi tương tự
cho a bang 2^2+2^3+...+2^20 chung minh rang A+4 khong phai la so chinh phuong
chund minh rang 1+3+32+33+...+361+362 khong la so chinh phuong
chung to
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a, so co tong cac chu so la 2004 khong la so chinh phuong
b, so co tong cac chu so la 2006 khong la so chinh phuong
c, n = 20044+20043+20042+23 khong la so chinh phuong
cho S=1+3^1+3^2+3^3+...........+3^28+3^29+3^30
CMR:S khong phai la so chinh phuong
Cho A = 2^2 + 2^3 + 2 ^4 + ..... + 2^10. CMR : A + 4 khong phai la so chinh phuong.
hay chung minh rang A la so chinh phuong biet rang :A =1^3 + 2^3 + 3^3 + 4^3
So chinh phuong la so bang binh phuong cua mot so tu nhien ( vi du : 0,1,4,9,16,..) moi tong sau co la mot so chinh phuong khong?
a) 13 + 23
b) 13 + 23 33
C) 13 + 23 + 33 + 43
NHO GHI KET QUA GIUP MINH NHA CAM ON
cho A =3+3^2+.........+3^2004
chung minh A chia het cho 130
A co phai la so chinh phuong hay khong
lam cu the nhe
cho A=2*3*5*7*9*......*Pn la tich cua aso nguyen to dau tien. Chung to rang 3 so A-1;A;A+1 KHONG CO SO NAO LA SO CHINH PHUONG