FP2 - Hyperbolic functions question
It's the OCR (not MEI) Jan 08 paper question 8:
My problem is on part iii)
I get:
( for +1/2)
but there's another answer and I'm not sure how to get it. If you try and get a quadratic in e^x using the -1/2 answer instead of +1/2, the discriminant is <0.
;<
My problem is on part iii)
I get:
( for +1/2)
but there's another answer and I'm not sure how to get it. If you try and get a quadratic in e^x using the -1/2 answer instead of +1/2, the discriminant is <0.
;<
(edited 12 years ago)
Using -1/2, you should still get a real answer (I believe it's ln[(sqrt(5)-1)/2])
Original post by kogaht
this is making me really nervous 
sorry!:>
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