use mathematical induction to prove the formula for every positive integer n.
3 + 5 + 7 + ... + (2n +1)= n(n +2)
this is a beastly problem.
i have proven that
n=1 so 2(1)+1=1(1)+2
3=3 so this works but now im dont know what to do next. i know im suppose to go further but im so lost. please help me understand this.