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e^-x, solve for x

Solve for x

0.5y = e^-x



I believe the answer is x = ln(2/y)

Would anyone be able to explain the intermediate steps please?

If I was trying it I would have got -ln0.5y = x
Reply 1
your answer is the same
Reply 2
ln0.5y=lny2ln0.5y = ln\frac{y}{2}

and

lny2=ln(y2)1-ln\frac{y}{2} = ln(\frac{y}{2})^{-1}
(edited 12 years ago)
Reply 3
-ln(0.5y)=ln((y/2)^-1)=ln(2/y)
Reply 4
Original post by TenOfThem


lny2=ln(y2)1-ln\frac{y}{2} = ln(\frac{y}{2})^{-1}


Okay, thank you.

I didn't realise that.

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