# AS level C1 Diffrentiation help (real quick)Watch

#1
Okay, from the previous post I'm not extremely stuck. I've got the equation of the line correct I don't know how to find the co ordinates
"Find the equation of the normal to the curve with equation y equals the square root of x at the point (1,1)
Calculate the co ordinates of the point at which this normal meets the graph of y equal negative square root of x"

From finding out the normal which I did successfully I got y=-2x+3
But where do I go from there?
0
4 years ago
#2
Okay, from the previous post I'm not extremely stuck. I've got the equation of the line correct I don't know how to find the co ordinates
"Find the equation of the normal to the curve with equation y equals the square root of x at the point (1,1)
Calculate the co ordinates of the point at which this normal meets the graph of y equal negative square root of x"

From finding out the normal which I did successfully I got y=-2x+3
But where do I go from there?
I'm assuming your answer to the first part is correct. You know that the following statements will be true for this point: y=-2x+3 and y=-x^0.5. So what's the obvious thing to do?
0
#3
(Original post by Chlorophile)
I'm assuming your answer to the first part is correct. You know that the following statements will be true for this point: y=-2x+3 and y=-x^0.5. So what's the obvious thing to do?
They're a simultaneous equation? So you should substitute the values into each other or eliminate depending which is easier really. I think substituting them into each other would work. Is that right?
0
4 years ago
#4
They're a simultaneous equation? So you should substitute the values into each other or eliminate depending which is easier really. I think substituting them into each other would work. Is that right?
Substitution is always the way to go.
0
4 years ago
#5
They're a simultaneous equation? So you should substitute the values into each other or eliminate depending which is easier really. I think substituting them into each other would work. Is that right?
Well just make them equal... -x^0.5=-2x+3
0
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