The microwave radiation penetrates building materials effectively, unless you have aluminum foil as an insulator in your house or on your head. A tin foil hat will protect you. An antenna for a microwave measurement could be useful too.
The signal power from a cell phone mast is...
You can use "partial fractions" to simplify.
[1/(2+x) - 1/2] / x <=> 1/x(2+x) - 1/2x <=> 1/2x-1/(2x+4)-1/2x <=> -1/(2x+4)
When x goes to 0, the solution is goes towards -1/4 = -1/(2*0+4)
The partial fraction of found by solving
1/x(2+x) = a/x + b/(x+2)
You can use "partial fractions" to simplify.
[1/(2+x) - 1/2] / x <=> 1/x(2+x) - 1/2x <=> 1/2x-1/(2x+4)-1/2x <=> -1/(2x+4)
When x goes to 0, the solution is goes towards -1/4 = -1/(2*0+4)
The partial fraction of found by solving
1/x(2+x) = a/x + b/(x+2)