How do resistors in parallel affect the total resistance?

They're going to increase the total resistance as

Explanation:

If the resistors are in parallel, the potential difference is the same for each resistor. But the total current is the sum of the currents that pass through each of the resistors. Then

where

but

for

so

where

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

i believe the answer would be:

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