In the figure above, if AC CE and B is the midpoint of AC. CD = 2 and AB = 3. Find the following: 25) BC
26) AC
27) DE

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle