Các câu hỏi tương tự
cho tong S=1+3+5+....+2015. tinh s chung to S la so chinh phuong a tim cac uoc nguyen to hac nhau cua S
CM A ko la so chinh phuong va A=5+5^2+.....+5^200
cho tong S= 1+3+5+....+2009+2011
a) tinh S
b chung to S la so chinh phuong
c tim cac uoc nguyen to khac nhau cua S
M=1+5+5^2+5^3+5^4+...........+5^2013.
em hay chung to:4M+1 la 1 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=2.1+2.3+2.32+....+2.32004
a)thu gon S
b)tim so tan cung cua S. tu do suy raS khong phai la so chinh 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
tim số nguyen duong nho nhat thoa man mot phan 2 so do la so chinh phuong,mot phan 3 so do la luy thua bac 3 cua 1 so nguyen, mot phan 5 so do la luy thua bac 5 cua 1 so nguyen
Cho A = 5+52+53+...+5100
a)so A la so nguyen to hay hop so
b)so A co phai la so chinh phuong khong?