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Exponential and Logarithms Maths help!

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It's 3bii) that I am stuck on. I've got all the parts before it right, as I am able to check my answers with the correct ones at the bottom of the picture. However I don't know how to do 3bii)???

Can somebody help me please? 😘
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Avatar for Lissy14
Lissy14
16
M is a maximum point. At the max, the gradient of the line is 0. This means dy/dx will equal 0 at this point.
So You need to differenentiate the equation.
Then set it equal to 0.
Then solve for x

Do you understand that/want help with any of it? :smile:
If it's 3bii you're stuck on, note that y = 0 at point B, and set y = 0 in the given curve formula. You will then need to rearrange the expression to make x the subject. Post your working if you get stuck.

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