The Student Room Group

Is this question wrong (question 8 of the link)

Reply 1


Instead of what? Which part are you doing?
Reply 3
Original post by ghostwalker
Instead of what? Which part are you doing?

Part a of question 8
Original post by M.IC3
Part a of question 8


In that case the given derivative in the paper is correct.
Reply 5
Original post by ghostwalker
In that case the given derivative in the paper is correct.

How would you work it out, I used the quotient rule but its still not falling out :frown:
Original post by M.IC3
How would you work it out, I used the quotient rule but its still not falling out :frown:


Quotient rule works fine - post your working.
Reply 7
6001E332-8D1E-4023-94E3-7C43CE14983C.jpg.jpeg sorry for the messy working I did it on a scrap piece of paper
Original post by M.IC3
sorry for the messy working I did it on a scrap piece of paper

Everything was fine up to the very last line.

When you took the t^(1/3) down into the denominator, you need to multiply the entire top by t^(1/3) (not just the first term), which would give you the (1-2t^2) in the brackets in the numerator.
Reply 9
Original post by ghostwalker
Everything was fine up to the very last line.

When you took the t^(1/3) down into the denominator, you need to multiply the entire top by t^(1/3) (not just the first term), which would give you the (1-2t^2) in the brackets in the numerator.


🀯 ohhh that’s a silly mistake on my behalf but thanks for the help

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