Question Number 124517 by help last updated on 03/Dec/20
Commented by help last updated on 03/Dec/20
$${find}\:{the}\:{value}\:{of}\:{r}\:{that}\:{satisfy}\:{the} \\ $$$${equation} \\ $$
Commented by help last updated on 03/Dec/20
$$\mathrm{87}=\mathrm{8}/\left(\mathrm{1}+{r}\right)^{\mathrm{5}} +\mathrm{8}/\left(\mathrm{1}+{r}\right)^{\mathrm{6}} ....\mathrm{108}/\left(\mathrm{1}+{r}\right)^{\mathrm{10}} \\ $$
Commented by mr W last updated on 04/Dec/20
$$\mathrm{108}\:{makes}\:{no}\:{sense}. \\ $$$${question}\:{is}\:{wrong}! \\ $$