Maths help

Find the second derivative of x^2/sqrt(x^2+1).
Is there a faster way of finding the answer :smile:

?Also, how do you find the stationary value.Please explain.

(edited 9 years ago)

Find the second derivative of x^2/sqrt(x^2+1). Is there a faster way of finding the answer :smile:

Not that I'm aware of, off hand.

Also, how do you find the stationary value.Please explain.

Work out the first derivative and set it equal to zero.

Note that for a fraction to be zero, you require the numerator to be zero.

Can you show me the working,please, if you don't mind.

Can you show me the working,please, if you don't mind.

Standard quotient rule - yes, it's messy.

You're not going to learn anything by my doing it for you. Do have a go.

Do you think it is possible to find the stationary value from the first derivative?

Do you think it is possible to find the stationary value from the first derivative?

That's the usual way to do it, as I said in my first post.

Thank you ghostwalker! I have the answer. :biggrin:

(edited 9 years ago)

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