- #1
pokemeharder
- 18
- 0
Homework Statement
I can't find the intersection for Line y = 3/4x - 35/4
and Circle y^2 + x^2 = 25
pokemeharder said:ah can someone do this for me please, I'm stuck
pokemeharder said:i kno but i gor to 0 = -3/4x + 5ix + 35/4 and i don't really kno how to solve that
pokemeharder said:now i just need to show that the circle and the line don't intersect algrebraecally or however you spell it.
Incorrect -- sometimes complex equations can have real solutions. You have to show the solutions are not real. (say, by solving it)so wait this function 0 = -3/4x + 5ix + 35/4 has no real solutions because there is a complex number right?
pokemeharder said:so wait this function 0 = -3/4x + 5ix + 35/4 has no real solutions because there is a complex number right?
pokemeharder said:well if u set the y values to equal each other
3/4x + 35/4 = sqr root of (25 - x^2)
you get 0 = -3/4x + 5ix + 35/4
pokemeharder said:well u change it into sqr(25) x sqr(-x^2)
then u sqroot the 25 to 5 and the sqr root of -x^2 is sqr(-1) x sqr(x^2)
so its 5ix
i = sqr(-1)
hacker077 said:you must be an idiot if you can't get this. its quite damn simple...read your textbook
pokemeharder said:the square root of -1 is called i
its always called i
pokemeharder said:thats why it doesn't work out
its not quadratic anyways there's no x squared
pokemeharder said:oh yeah right...
didnt see that
how do u deal with the root properly then lol
d_leet said:Well what happens if you square the square root of something.
pokemeharder said:XD right sry i feel stupid now
um thanks alot
To find the intersection points between a circle and a line, you can use the equation of a circle and the equation of a line. Set the equations equal to each other and solve for the x-values of the intersection points. Then, plug the x-values into the equation of the line to find the y-values. This will give you the coordinates of the intersection points.
No, a line can only intersect a circle at a maximum of two points. This is because a line and a circle can only intersect at most twice, unless the line is tangent to the circle, in which case it will only intersect at one point.
If the line is tangent to the circle, it means that it touches the circle at exactly one point. In this case, the line and the circle share the same point of intersection. Therefore, the coordinates of the intersection point will be the same for both the line and the circle.
Yes, a line can be parallel to a circle. This means that the line and the circle do not intersect at any point. In this case, there will be no intersection points between the line and the circle.
Yes, it is possible for a line to intersect a circle at exactly one point. This can happen if the line is tangent to the circle, as mentioned in question 3. It can also happen if the line is a chord of the circle, which means it crosses through the center of the circle.