I'm trying to solve this problem where I have to find the total resistance of a circuit with polarized capacitors. if two capacitors have opposite poles from each other in series would that change their sign when adding them?

thank you

 

If two, same-value, aluminum electrolytic capacitors are connected in series, back-to-back with the positive terminals or the negative terminals connected, the resulting single capacitor is a non-polar capacitor with half the capacitance.

Quote from this :
http://www.cde.com/resources/catalogs/AEappGUIDE.pdf