What is the sum of all natural numbers $x$ that satisfy the exponential inequality $\left( 3 ^ { x } - 5 \right) \left( 3 ^ { x } - 100 \right) < 0$? [3 points] (1) 5 (2) 7 (3) 9 (4) 11 (5) 13
What is the sum of all natural numbers $x$ that satisfy the exponential inequality $\left( 3 ^ { x } - 5 \right) \left( 3 ^ { x } - 100 \right) < 0$? [3 points]\\
(1) 5\\
(2) 7\\
(3) 9\\
(4) 11\\
(5) 13