Các câu hỏi tương tự
tong hoac hieu sau day la so nguyen to hay hop to
bai 1015+11
tong hieu sau la so nguyen to hay hop so
23.27.29+1
tong sau la so nguyen to hay hop so :
a) 2 . 3 .5 + 9 . 31
b ) 5 . 6 . 7 + 9 .10 . 11
TONG SAU LA SO NGUYEN TO HAY HOP SÒ
2.3.5.9+31
Bai 1:tim so nguyen P biet P+2va P+4 deu la nguyen to
bai 2: tong 2^100×7×11+81^3 la nguen to hay hop so ( giai thich)
Bai 3: tim so nguyen to P de P +2,p+6,P+8 deu la cac so nguyen to
tong sau day la so nguyen to hay hop so: 3.5.7 + (2n+1).(2n+3).(2n+5) voi n la so tu nhien
tong cua 2 so nguyen to lon hon 2 la so nguyen to hay hop so ? Tai sao ?
Xet xem tong , hieu sau la so nguyen to hay hop so
3.5.7+2011.2013
10^3-8
xet xem tong, hieu sau day la so nguyen to hay hop so
A=1.3.7.13-13
B=2.5.7+4.13