Hii all I got the formula of Decreasing Annuity from somewhere: (Da)-n = (n – a-n)/i Can we use this formula in exam although it is not given in core reading? Please anyone suggest Thanks
That formula is in the Tables on page 31. But you're right, it's not in Core Reading. To be honest, I'd not advise using it unless you're already familiar with it. It's easy to deal with decreases as negative increases, using (Ia)n. However, if a question says "calculate" then marks are awarded for the correct final answer, however that is obtained, so using (Da)n would not be penalised.
