%0 Journal Article %A Cobacho Tornel, María Belén %T Indefinite integral - Marginal investment %D 2017 %U http://hdl.handle.net/10317/6250 %X In this video we solve an exercise to calculate the interest of an investment starting from the marginal interest. %K Indefinite integral %K Marginal investment %~ GOEDOC, SUB GOETTINGEN