i:
2000000(1.025)^10 = R ((1.025^10-1)/(0.025)) + R ((1-1.015^-40)/(0.015))(1.015)
first of all you have to convert the interest rate to whatever it states it is in the question, ie. semi- annually 5%pa repayments, so thats just 0.05/2. you also have to adjust the number of time periods or...