5 mu n nhan 5 mu n cong 1 nhan 5 mu n cong 2 be hon hoac bang 10 mu 18
Cho A = /x-1/ + / x-11/
Tinh A khi 1 nho hon hoac bang x nho hon hoac bang 11
1) Tim cac so tu nhien biet 1950 nho hon hoac bang X nho hon hoac bang 2015
va X chia cho 4 du 1 ; chiacho 25 du 3
tim x biet:|x| nho hon hoac bang 5
|5×x-3|nho hon hoac bang 13
tinh tong cac so nguyen a sao cho:
-50<a<hoac bang 50
-100 nho hon hoac bang a va a nho hon 100
Tap hop c cac so tu nhiên lon hon hoac bang 35 nho hon hoac bang 28
Tim x,y
|x+45|+|-2y+5| nho hon hoac bang 0
A={x thuoc N /7nho hon hoac bang x nho hon hoac bang 50, x chia het cho 7
a, viet tap hop A bang cach liet ke cac phan tu
b, tim sophan tu cua tap hop tren