Question

Given the coordinates of two points P(4, -7) and Q( -5, 3). Then the value of [Abscissa of P - Ordinate of Q] is
a. 1
b.-2
c.-4
d. -1​

Answer 1

Answer:

c is right answer

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Answer 2

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Using the section formula, if a point (x,y) divides the line joining the

points (x

1

,y

1

) and (x

2

,y

2

) internally

in the ratio m:n, then (x,y)=(

m+n

mx

2

+nx

1

,

m+n

my

2

+ny

1

)

Substituting (x

1

,y

1

)=(4,−3) and (x

2

,y

2

)=(−1,7) and m=3,n=2 in the section formula, we get

the abscissa of the point (

3+2

3(−1)+2(4)

)=1