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# C3 easy question watch

1. Hey, this question is easy but I've confused myself a bit:

Question: find the equation of the normal to the curve at the point

My solution:

When x = ,

the gradient of the normal is

There are 2 methods now, which is correct?

1) Using the equation of a line formula:

OR THIS ONE:

2)

Which is right?! Thanks
2. Im sure some smart people on here could help?
3. But they both give different results?
4. (Original post by Mr.Pii)
Hey, this question is easy but I've confused myself a bit:

Question: find the equation of the normal to the curve at the point

My solution:

When x = ,

the gradient of the normal is

There are 2 methods now, which is correct?

1) Using the equation of a line formula:

OR THIS ONE:

2)

Which is right?! Thanks
The first is definately correct. With the second, how have you got from the first line to the second line?
5. (Original post by Mr.Pii)
Hey, this question is easy but I've confused myself a bit:

Question: find the equation of the normal to the curve at the point

My solution:

When x = ,

the gradient of the normal is

There are 2 methods now, which is correct?

1) Using the equation of a line formula:

OR THIS ONE:

2)

Which is right?! Thanks
You made a mistake in line 3 of (2)

6. (Original post by jdfan)
The first is definitely correct. With the second, how have you got from the first line to the second line?
i multiplied the -1/(2e^pi) by (x - pi) in the bracket
7. (Original post by steve2005)
You made a mistake in line 3 of (2)

nevermind. i have done it!

you was a great help. i would rep but it isnt worth anything
8. (Original post by steve2005)
You made a mistake in line 3 of (2)

That looks right to me

Can you explain why the should be e^-pi? It's just guna annoy me otherwise. Thanks

That looks right to me

Can you explain why the should be e^-pi? It's just guna annoy me otherwise. Thanks
Your first line is not correct. Look at the OP
10. (Original post by steve2005)
Your first line is not correct. Look at the OP
Oh ****. I never notice the obvious stuff.

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