Question

[người bí ẩn]

Bai 1: Tim so nguyen x biet:

x+(x+1)+(x+2)+...+35=0

Bai 2: Tim GTLN:

a) 8-(x+2)^2=E

b) -|x+2|+10=F

Bai 3: Tim x \(\in\)Z:

a)(2x-4)(x+4)<0

b)(x+5)(3x-12)>0

Bai 11: Cho:

S=1-2+3-4+5-6+...+19-20

a) S co\(⋮\)2; 3; 5 khong?

b) Tim tat ca cac uoc cua S

chi tiet gi minh nha