Question

What is the equivalent resistance in a parallel circuit that has the following three resistors: 6.8 ohms, 9.0 ohms, and 15.0 ohms?

Answer 1

$1 \div 6.8 + 1 \div 9 + 1 \div 15 \\ 0.324836601ohm$
$formula \\ 1 \div r = 1 \div r1 + 1 \div r2 + 1 \div r3 \: so \: on$