-2013<x<2013
=>x thuộc {-2012;-2011;-2010;....;0;...;2010;2011;2012}
=>tổng các số nguyên x là :
(-2012)+(-2011)+(-2010)+...+0+...+2010+2011+2012
=[(-2012)+2012]+[(-2011)+2011]+...+0
=0+0+...+0
=0
cho tap hop A\(=\)32;34;36;......;88;9}
a.tinh so phan tu cua tap hop A
b.tinh tong cac phan tu cua tap hop A
nho ghi ro rang phep tinh luon nha cam on cac ban
1. Tim so nguyen to sao cho:
p+2;p+6;p+8;p+12;p+14 cung la so nguyen to.
2. Tim x biet:
60 = \(2^x\) * 3 * 5 va 60 co 12 uoc.
xin loi cac ban nha, may minh khong danh dau duoc, mong cac ban thong cam va lam dum minh nha!Cam on cac ban!
tinh tong cac so nguyen x biet /x/<25
a,Tim cac so nguyen a,b sao cho a.b=-3
b,tinh tong cac so nguyen x biet: -6<x+2<8
c,tim tat ca cac U(-15)
tinh tong cac so nguyen x biet: -2014<x<2015
tinh tong cac so nguyen x biet -103 \(\le\) x < 100
Tinh tong A + B biet rang A la tong cac so nguyen am le 2 chu so B la tong cac so nguyen duong chan co 2 chu so
tinh tong cac so nguyen x biet|x|<2017
Cuối HK1 vua qua hs 1 trung duoc xep thanh 4 loai : G,K,TB,Y. Biet so hs Kha la 114 em chiem 38% tong so hoc sinh toan truong .
Tinh :
A, tong so hs toan truong
B, Tinh so hs TB , biet neu chuyen 6 hs tu Y len TB thi hs yeu bang 4% s hs TB
CAC BAN GIAI GIUP MINH NHE. CAM ON CAC BAN