Calculate the value of the expression $lo g_{3} 18 - lo g_{3} 2$ .

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In an arithmetic progression $(a_{n})_{n \geq 1}$ , the first term is $a_{1} = 3$ and the common difference is $r = 4$ . What is the tenth term…
In a geometric progression $(b_{n})_{n \geq 1}$ , $b_{1} = 2$ and the common ratio is $q = 3$ . What is the sum of the first 4 terms $S_{4}$ ?
What are the coordinates of the vertex of the parabola associated with $f (x) = x^{2} - 4 x + 3$ ?
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