You have to simplify each expression:

1/R+1/T

multiply the first term by t/t, and the second R/R

You should then get...

(T+R)/RT

To simplify the expression 1/R + 1/T, you can find a common denominator by multiplying the first term by T/T and the second term by R/R. This gives you (T/RT) + (R/RT).

Now, since both terms have the same denominator (RT), you can combine them by adding the numerators. This results in (T+R)/RT.

So, the simplified expression is (T+R)/RT.