y=2^x y=3 ±√(1-2x)full working out and answer please
Last edited by darrenn6; Mar 5th 2012 at 09:19 PM.
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Originally Posted by darrenn6 y=2^x Take $\displaystyle \log_2$ to both sides Originally Posted by darrenn6 y=3 ±√(1-2x)full working out and answer please Start by squaring both sides.
Originally Posted by darrenn6 y=3 ±√(1-2x) y - 3 = +-SQRT(1 - 2x) square both sides: y^2 - 6y + 9 = 1 - 2x Continue...
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