find the ratio in which the line segment joining the point (-3,10) and (6,-8) is divided by (-1,6)
Answers
Answered by
2
Using
the section formula, if a point (x,y) divides the line joining the points
(x
1
,y
1
) and (x
2
,y
2
) in the ratio m:n, then (x,y)=(
m+n
mx
2
+nx
1
,
m+n
my
2
+ny
1
)
Let the ratio be k:1
Substituting (x
1
,y
1
)=(−3,10) and (x
2
,y
2
)=(6,−8) in the section
formula, we get (
k+1
k(6)+1(−3)
,
k+1
k(−8)+1(10)
)=(−1,6)
(
k+1
6k−3
,
k+1
−8k+10
)=(−1,6)
Comparing the x - coordinate,
k+1
6k−3
=−1
=>6k−3=−k−1
7k=2
k=
7
2
Hence, the ratio is 2:7
the section formula, if a point (x,y) divides the line joining the points
(x
1
,y
1
) and (x
2
,y
2
) in the ratio m:n, then (x,y)=(
m+n
mx
2
+nx
1
,
m+n
my
2
+ny
1
)
Let the ratio be k:1
Substituting (x
1
,y
1
)=(−3,10) and (x
2
,y
2
)=(6,−8) in the section
formula, we get (
k+1
k(6)+1(−3)
,
k+1
k(−8)+1(10)
)=(−1,6)
(
k+1
6k−3
,
k+1
−8k+10
)=(−1,6)
Comparing the x - coordinate,
k+1
6k−3
=−1
=>6k−3=−k−1
7k=2
k=
7
2
Hence, the ratio is 2:7
Answered by
4
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