Các câu hỏi tương tự
tong sau la so nguyen to hay hop so :
a) 2 . 3 .5 + 9 . 31
b ) 5 . 6 . 7 + 9 .10 . 11
tong hieu sau la so nguyen to hay hop so
23.27.29+1
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 ?
tong hoac hieu sau day la so nguyen to hay hop to
bai 1015+11
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
tong ( hieu) sau la nguyen to hay hop to:
3.4.5.7+6.11.14
tong (hieu) sau la so nguyen to hay hop so
a) 3.5.7 + 11.13.17
b)16 354 + 67 541
c)7.9.11.13 - 2.3.4.7