answer for this sum

Dear Student

The position vector of point R dividing the line segment joining two points

P and Q in the ratio m: is given by:

  1. Internally:

  1. Externally:

So let point C divides line segment AB internally
OC =32a+4b+2a-8b3+1=2a+b
Now let point D divides line segment AB externally
OD =32a+4b-2a-8b3-1=2a+10b


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