[tex]2700=2300(1+r)^5\ /:2300\\\\(1+r)^5= \frac{27}{23} \ \ \ \Rightarrow\ \ \ 1+r= \sqrt[5]{ \frac{27}{23}} \ \ \ \Rightarrow\ \ \ r= \sqrt[5]{ \frac{27}{23}} -1\\\\ r= \sqrt[5]{ \frac{27\cdot23^4}{23^5}}-1= \frac{ \sqrt[5]{ 27\cdot23^4} }{23} -1= \frac{ \sqrt[5]{7555707} }{23} -1[/tex]
