Các câu hỏi tương tự
tìm n a)1: 9. 27n=3n
tim x
-(-x)/3-2/10=-1/5 -9/30
P=-|5/3-X|
Q=9-|x-1/10|
tim GTLN
biet rang 1^2+2^2+3^2+....+10^2=385.Tim x biet x+10^2+12^2+14^2+...+20^2=2011+1^2+3^2+...+9^2
Tim x sao cho (x+1/8)+(x+2/9)=(x+3/10)+(x+4/11)
Tim xthuoc Z biet:
1,|2x-5|-|2x+9|=0
2,|x+1|-|x+2|-|3-x|=7
3,|2x+3|+|3x+2|-|4-x|=10
tim gia tri tuyet doi lon nhat cua cac bieu thuc sau:
a,M=-|5/3-x|.
b,N=9-|x-1/10|.
P=10-|3x-2|-|3y+4|
tim gia tri tuyet doi lon nhat cua cac bieu thuc sau:
a,M=-|5/3-x|.
b,N=9-|x-1/10|.
P=10-|3x-2|-|3y+4|
Tim x biet:
a.2|2x-3|=1/2
b.(x-1)^2=9/16
c.3/5(x-5/6)-1/2(3/2-1)=-1/4
d.1/3+1/6+1/10+......+2/x(x+1)=2015/2016