9-7 The present value of a perpetuity is equal to the payment on the annuity, PMT, divided by the interest rate, r: PVP PMT r. What is the sum, or future value, of a perpetuity of PMT dollars per year? (Hint: The answer is infinity, but explain why.)
The future value of cash flow, PMT is given by
FV of cash flows= PV * [(1+ r)^n]
We know , PV =( PMT / r) , as per the formula for Perpetuity
So FV of Perpetuity = (PMT/r) *[(1+r)^n]
For a perpetuity n is number of years tends to infinity ()
As N , T ,
The entire RHS(Right hand side)
Hence, FV of Perpetuity
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