Maths questions (1 Viewer)

[RealiseNothing]

#400th post

If you equate them and let them be equal to each other it implies they have the same y-values.





Which implies the distance 'd' is always equal to 0.

 

[Smile12345]

Thanks all!

 

[Smile12345]

2a) Find equation of AB. Sub in (-2,1), then make b the subject.

Thanks.

 

[Squar3root]

If you equate them and let them be equal to each other it implies they have the same y-values.





Which implies the distance 'd' is always equal to 0.

Then how would one do it?

 

[Smile12345]

Q1
a) Y is directly below X, so to find distance XY, just get top point minus bottom point (y-values) (XY is a vertical distance)
Before this is all done, tell me what point X and Y are

b) Calculus

Q2
a) U can do this, use what they gave u, the point (-1,2) lies on AB --> what does this mean...?

b) To find 2 unknowns, u need 2 equations. Make another equation with 'a' and 'b' (i.e. a relation between a and b) somehow...
If (-1,2) lies on the line AB, what else can u deduce besides that (-1,2) satisfies eqn AB? (it'll be helpful if you can produce a diagram to inspect)

Thanks heaps....

1a) X and Y are points on two parabolas.

2a) point lies on the hypotenuse.
b) Use the area of a triangle formula...

 

[Smile12345]

I have now got the answers!!