Question

the line joining (2,1) and (5,6) is bisected at p. If p lies on the line 2x + 4y + k =0, find the value of k.

Answer 1

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Answer 2

First mid point theorem
x=2+5/2=7/2
y=1+6/2=7/2
2x+4y+k=0
7+14+k=0
k=-21