I did some rough calculations and this is what i did Too bad handwriting I know
There are 4 steps:
1. Finding co-ordinates of A and B 2. Constructing the line which is a perpendicular bisector of AB 3. Finding the intersections, C and D, between this perpendicular bisector and the curve 4. Using Pythagoras to calculate the distance between the C and D
Unfortunately, you have failed to find the co-ordinates of A and B correctly.
x−y+2=0⇒y=x+2
⇒2x2−(x+2)2+2x+1=0
⇒2x2−(x2+4x+4)+2x+1=0
⇒2x2−x2+2x−4x+1−4=x2−2x−3=0
Can you see where you went wrong? Can you carry on from there?
1. Finding co-ordinates of A and B 2. Constructing the line which is a perpendicular bisector of AB 3. Finding the intersections, C and D, between this perpendicular bisector and the curve 4. Using Pythagoras to calculate the distance between the C and D
Unfortunately, you have failed to find the co-ordinates of A and B correctly.
x−y+2=0⇒y=x+2
⇒2x2−(x+2)2+y2x+1=0
⇒2x2−(x2+4x+4)+2x+1=0
⇒2x2−x2+2x−4x+1−4=x2−2x−3=0
Can you see where you went wrong? Can you carry on from there?
Brother you might be doing wrong..look putting value of y, from line one that is the straight line that intersect, into equation of curve line is wrong way You get it
Thats where im stuck at I m making some mistake here Can you solve the rest for me
Actually you don't need to do that. You need to find the midpoint of AB and find a line that passes through the midpoint and is perpendicular to the line AB. I assume you can find gradients of lines and know the conditions for lines to be perpendicular.
Brother you might be doing wrong..look putting value of y, from line one that is the straight line that intersect, into equation of curve line is wrong way You get it
What??? Are you saying substituting the equation of the line into the curve is a 'wrong' way???
I'd hate to break it to you but you're doing the exact same thing with your working out, you're just finding what y2 is first before substituting it into the curve's equation.
Also, having looked over your working out, you said y2=x2+4 which is incorrect because y2=(x+2)2=x2+4
I'm just...i don't know I find cords for A and B Solved their gradient and their midpoint Got gradient of Line CD Got equation of line CD I substitute equation of curve to equation of line CD But still im doing it the wrong way
I'm just...i don't know I find cords for A and B Solved their gradient and their midpoint Got gradient of Line CD Got equation of line CD I substitute equation of curve to equation of line CD But still im doing it the wrong way