Which of the follwing statements are correct ?
1. The coordinates of the point R which divides the line
segment joining two points P(x1,y1,z1) and Q(x2,y2,z2)
externally in the ratio m:n are (mx2+nx1m+n,my2+ny1m+n,mz2+nz1m+n).
2. If R divides PQ internally in the ratio m:n, then its coordinates
are obtained by replacing n by -n in the statement 1.
None of these
1. The coordinates of the point R which divides the line segment
joining two points P(x1,y1,z1) and Q(x2,y2,z2) internally in
the ratio m:n are (mx2+nx1m+n,my2+ny1m+n,mz2+nz1m+n).
2. If the point R divides PQ externally in the ratio m:n, then its coordinates are obtained by replacing n by -n so that the
coordinates of point R will be (mx2−nx1m−n,my2−ny1m−n,mz2−nz1m−n)
So,both the given statements are false.