Các câu hỏi tương tự
tim x thuoc z biet (x-5)^x+1-(x-5)^x+5
Tim x biet 2(|x-1|+x-4/5)=2x-2/5
tim x biet 5/4*(x-8)=-5/3(14-1/2)
Tim x biet 2.(x-3)-3.(x-1)-5
tim x biet : 4-|x-1/5|=-1/2
1)tim x biet rang:
a)3^x-1=1/243
b)2^x+2^x+3=144
c)81^-2x.27x=9^5
2)tim tiep so ghang thu 5 cua day so sau:-1/a^2;2/a^3;-6/a^4;24/a^5;...
3)tim so tu nhien x biet :
a)4^x+4^x+3=4160
b)2^x-1+5.2^x-2=7/32
tim x biet :
a) |x+1| +|x-5| = 7
b)|2x + 5|=3x-8
tim x,y biet 1/x+1/y=1/5 thanks
a,tim x biet |x-2|+|3-2x|=2x+1
b,tim x,y thuoc Z biet xy+2x-y=5
c, tinh A=(1-1/15)(1-1/21)(1-1/28).....(1-1/210)