Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

Year 12s: what will be the first way you research your future options? >>

C4 binomial help

Hey just doing some Easter revision. I have no idea why my answer to the second part of this question is horrifically wrong

Any help would be greatly appreciated, thanks

Original post by hi-zen-berg

Hey just doing some Easter revision. I have no idea why my answer to the second part of this question is horrifically wrong

Any help would be greatly appreciated, thanks

4(2 - 5x)^{-1} = 4(2(1-5/2x))^{-1} = 4(2^{-1})(1-5/2x) = 2(1 - 5/2x)

Then you cube that. You've multiplied by 2 instead.

(edited 8 years ago)

OP

Original post by Zacken

4(2 - 5x)^{-1} = 4(2(1-5/2x))^{-1} = 4(2^{-1})(1-5/2x) = 2(1 - 5/2x)

Then you cube that. You've multiplied by 2 instead.

Thanks a lot man really helpful

Original post by hi-zen-berg

Thanks a lot man really helpful

Pleasure. :-)

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