Các câu hỏi tương tự
Cho A= 2. 4. 6. 8. 10 + 18
a) A co chia het cho 2, cho 3, cho 9 ko? vi sao?
b) A la hop so hay so nguyen to? vi sao?
c) Aco phai la so chinh phuong ko? vi sao?
tinh a=1.2+2.3+3.4+...+2019.2020
a=3+3^2+3^3+3^4+...+3^331
chung minh a khong chia het cho 13
a co phai so chinh phuong 0
Chung minh: Co 3 so chinh phuong se luon co 2 so co hieu chia het cho 4
Giup minh nhanh nhe, minh cho 3 tk!
cho a=2+2^2+2^3+............+2^2015 Chung minh a ko chia het 7
a co la so chinh phuong ko vi sao
mn giup minh voi
cam on nhung ban nao da giup minh giai bai toan nay
Cho B=2+2^2+.....+2^2019
a, Tim x eN sao cho A+2=2^x+100
b, A+2 co phai la mot so chinh phuong khong
c, A =3+3^2+....+3^300
chung to A chia 13
d, 2A + 3 co phai la so chinh phuong ko
A=3+3^2+3^3+...+3^2004
a) CMR: A chia hết cho 130
b) A co la so chinh phuong khong ? tai sao?
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?
Cho A=5+5^2+5^3+...+5^2016
a, A la hop so hay so nguyen to
b,A co phai la so chinh phuong khong ?
giup minh giai voi nha cac ban \(\)
Cho A=3+3^2+3^3+3^4+...+3^100
a, tinh gia tri cua A
b, Chung to A chia het cho 10
c, tim so du cua A khi chia cho 13
d, tim x 2A-3=3^x+100
e, 2A co phai la so chinh phuong khong
dag can gap