R = U I {\displaystyle R={U \over I}} x + 2 a + 3 {\displaystyle {\sqrt[{a+3}]{x+2}}} 6 x x {\displaystyle {\sqrt[{x}]{6x}}}
![{\displaystyle {\sqrt[{a+3}]{x+2}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/a4d780fc143e4990e57eb244f21879365cffa3bc)
![{\displaystyle {\sqrt[{x}]{6x}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/8cde2c890ea33d0314324ff26a089988d3da66a9)