The entire question was worth 5 marks
We got given the formula for the area of a semi circle and a rectangle attached to it, in terms of pie and r (radius) and it was equal to A.
Then it asked to prove that the greatest area of the shape was an expression, which they gave us.
I differentiated the equation they gave us, but got the wrong value of r (radius expression), meaning that I could never make it equal to the expression they told us to equal it to.
I differentiated correctly, and proved that it would be maximum, but rearranged to make subject r incorrectly, meaning I could not prove it at all.
How many marks would I get?
Turn on thread page Beta
How many marks will i get for this question? watch
- Thread Starter
- 19-02-2018 18:44
- Official Rep
- 21-02-2018 22:16
Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.