Help with this differentiation question!! Watch

NickyConfused
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#21
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#21
(Original post by TenOfThem)
Why would you want to cube it

Can you do this question

\dfrac{1}{3} + \dfrac{1}{27}

Or this question

\dfrac{1}{a} + \dfrac{1}{a^3}
the bottom one is hard
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Mr M
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#22
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#22
(Original post by NickyConfused)
the bottom one is hard
So you need to study GCSE algebraic fractions before proceeding further.
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Kvothe the Arcane
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#23
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#23
(Original post by Mr M)
I can tell you are not a teacher. That isn't pitched at an appropriate level I'm afraid!
Indeed. Ah, sorry about that.
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Mr M
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#24
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#24
(Original post by NickyConfused)
the bottom one is hard
\displaystyle \frac{1}{a}+\frac{1}{a^3}=\frac{  a^2}{a^3}+\frac{1}{a^3}=\frac{a^  2+1}{a^3}
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TenOfThem
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#25
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#25
(Original post by NickyConfused)
the bottom one is hard
As Mr M has said - you need to recap some GCSE algebra

They should both be very straight forward
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0907714
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#26
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#26
Remember these tricks?
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NickyConfused
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#27
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#27
(Original post by 0907714)
Remember these tricks?
ah yes I remember that! Haven't used it in a while! Thank you, this was just what I needed!
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