Please prove the ending balance of mortgage loan

4. For a fixed-rate mortgage loan with initial balance MBo, monthly interest rate i, initial time to maturity n (in months), prove that its ending balance of month t is: MR. (1+i)" (1+i)!] [ (1+i)"1 ] 4. For a fixed-rate mortgage loan with initial balance MBo, monthly interest rate i, initial time to maturity n (in months), prove that its ending balance of month t is: MR. (1+i)" (1+i)!] [ (1+i)"1 ]