Các câu hỏi tương tự
1so nguyen to chia cho 30 co so du la r tỉm r biet r ko phai la so nguyen to
3+3^2+...+3^2015+3^2016.cm ko phai so nguyen to
7+7^2+...+7^2015+7^2016.cm ko phai so nguyen to
tim so co 9uoc nguyen duong ( ko phai so 100)
91 nhan 13 cong29nhan 13cong 15nhan 13 co phai la so nguyen to ko .vi sao..................khong tinh
cho minh hoi phan so co phai la so nguyen ko
cho p la tich 2016 so nguyen to dau tien. chung minh p-1 va p+1 ko phai so chinh phuong
Cho B = 3 /4+8 /9+15/ 16+...+2499 /2500. CMR B ko phai so nguyen
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?