3/2+5/4+9/8+17/16+33/32-6+x-1/x+1=31/32-2/2015(mik vd minh họa còn bn tự tính)
?1+x-1/x+1=?2
(x-1):(x+1)=?2-?1
x:(-1+1)=?3
x:0=?3
x=?3.0
x=0(số nào nhân vs 0 cx = 0)
k cho mik nha
= 1+1/2+1+1/4+1+1/8+1+1/16+1+1/32-6+x-1/x+1=31/32-2/2015
=(1+1+1+1+1)+(1/2+1/4+1/8+1/16+1/32)-6+x-1/x+1=31/32-2/2015
=5+31/32-6+x-1/x+1=31/32-2/2015
=(5-6)+x-1/x+1=31/32-2/2015-31/32
=-1+x-1/x+1=-2/2015
=x-1/x+1=-2/2015+1
=x-1/x+1=2013/2015
suy ra x-1=2013/x+1=2015
suy ra x=2014
= 1+1/2+1+1/4+1+1/8+1+1/16+1+1/32-6+x-1/x+1=31/32-2/2015
=(1+1+1+1+1)+(1/2+1/4+1/8+1/16+1/32)-6+x-1/x+1=31/32-2/2015
=5+31/32-6+x-1/x+1=31/32-2/2015
=(5-6)+x-1/x+1=31/32-2/2015-31/32
=-1+x-1/x+1=-2/2015
=x-1/x+1=-2/2015+1
=x-1/x+1=2013/2015
suy ra x-1=2013/x+1=2015
suy ra x=2014
