DatAtarLyfe
Booty Connoisseur
- Joined
- Mar 10, 2015
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- HSC
- 2016
Re: Year 11 Mathematics 3 Unit Cambridge Question & Answer Thread
Lol, i was right but deleted my post cause i was like "wait wtf, it's 28/5y"I take it to mean: x^2 = (28/5)y
In that case simply express in the form: x2 = 4ay
For this question: x^2 = 4* (7/5)*y
so, the focal length "a" is 7/5.