Question

3
Find a and b, if
(a) (a-1, b) = (2, 3)​

Answer 1

Since, AD=3AB=>

BD

AD

=

2

3

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

line joining the points (x

1

,y

1

) and (x

2

,y

2

)externally 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

)=(1,1) and (x

2

,y

2

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

C=(

3−2

3(2)−2(1)

,

3−2

3(−3)−2(1)

)=(4,−11)

Answer 2

Step-by-step explanation:

hope it helps u...