দ্বিতীয় অধ্যায় | ভেক্টর ( VECTORS)
zcx
zcx
sdf
xv
xv
sfd
df
zxc
sdf
sd
zc
sad
xzvczx
fg
sd
hghj
bvb
jhvjh
cxv
cx
cv
cv
fd
zxc
zxc
xcz
vc
zcx
cvx
xcz
zc
zc
zcx
zcx
sdf
sdf
sfd
sdf
sdf
sdf
sdf
sdf
sad
df
sdfsd
sdf
sfe
fdg
sdf
sdf
dzf
sdf
sdf
sdf
dsg
sfd
ds
xv
df
sd
fg
sdf