Given an effective annual discount rate of d, show that, with compounding, the accumulated value after n years of an initial investment of amount 1 is (1-d)^-n. In other words, if an amount X due in n years has present value 1, then X = (1-d)^-n. Given an effective annual discount rate of d, show that, with compounding, the accumulated value after n years of an initial investment of amount 1 is (1-d)^-n. In other words, if an amount X due in n years has present value 1, then X = (1-d)^-n