Q16 Share your answers here (1 Viewer)

Drongoski

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Sorry. Posted my tiny contribution elsewhere. Here it is again:

Q16(c)

Easy to show triangles AXY and ABC are similar (they are equi-angular).

Similarly for triangles BXY and BAD

.: their corresponding sides are proportional.

.: XY/AD = BX/AB

.: XY/BC = AX/AB

.: XY/AD + XY/BC = BX/AB + AX/AB = (AX + BX)/AB = AB/AB = 1

.: Dividing throughout by XY:

1/XY = 1/AD + 1/BC


QED
 
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dunjaaa

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scan0001.jpg My solutions for question 16 b) carp question, forgive me for my terrible handwriting :p
 

hjed

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well it said 10carp are introduced into the lake so
I missed that, it that case you'd have to integrate dP/dt, get the equation for P and then sub that back in to dP/dt ... what where the marks in v for then, I assumed at least one was for integrating P?
 

untamedkid

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so for last part of carp question I wrote 135.41, you guys thing i will get it wrong ? coz the answer is 135.4025, :(
 
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Samir97

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so for last part of carp question I wrote 135.41, you guys thing i will get it wrong ? coz the answer is 135.4025, :(
If its 50ln15 then its right though it'd be best if you left in exact form
 

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