Annuity A pays 1 at the beginning of each year for three years. Annuity B pays 1 at the end of each year for four years. The Mac
aulay duration of Annuity A at the time of purchase is 0.93. Both annuities offer the same yield rate. Calculate the Macaulay duration of Annuity B at the time of purchase.
Solve this by factorising like this: F(x)= x^2-5x+6 = (x-2)(x-5) X= 2 or x= 5 So the axis of symmetry is 3.5 ( got this by dividing 2 and 5 in the middle on the number line or you can call it cetacean plane