Question

17. Point P divides the line segment joining R (-3, - 4) and S (2.5) in ratio k:1. If P lies on y axis, then value of k is (a) 5/4 (b) 3/2 (C) 1/3 (d) 14​

Answer 1

Answer:

3/2

Step-by-step explanation:

If P lies on y axis then x is zero ie P(0,y)

section formula is P(x,y) = (mx2 + nx1/m+n,my2+ny1/m+n)

0 = mx2+nx1/m+n

where m=k,n=1,x2=2 and x1=-3

then

0= 2k -3/k+1

cross multipy

3=2k

k=3/2