can you prove (Ia) and (Is) ? This is topic on General Annuities and section discuss Payment Varying in Arithmatic Progression [Special Case]

1. Increasing annuity with P = 1,Q = 1: for EC -nun -nun (la)n = ant + ] =) n im (13) = S Sat - (n+1) Phone for EC 1. Increasing annuity with P = 1,Q = 1: for EC -nun -nun (la)n = ant + ] =) n im (13) = S Sat - (n+1) Phone for EC