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Maths-

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Easy

Question

If the two circles, $x to the power of 2 end exponent plus y to the power of 2 end exponent plus 2 g subscript 1 end subscript x plus 2 f subscript 1 end subscript y equals 0$ and $x to the power of 2 end exponent plus y to the power of 2 end exponent plus 2 g subscript 2 end subscript x plus 2 f subscript 2 end subscript y equals 0$ touches each other, then‐

$f_{l} g_{1} = f_{2} g_{2}$
$\frac{f_{1}}{g_{1}} = \frac{f_{2}}{g_{2}}$
$f_{1} f_{2} = g_{l} g_{2}$
none

The correct answer is: $fraction numerator f subscript 1 end subscript over denominator g subscript 1 end subscript end fraction equals fraction numerator f subscript 2 end subscript over denominator g subscript 2 end subscript end fraction$

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