Answer:1. Arithmetic 2. Arithmetic 3. Geometric 4. Geometric Step-by-step explanation:Formula of Arithmetic Sequence:[tex]an = a1 + (n - 1)[/tex]Formula of Geometric Sequence:[tex]an = a1 rn { - }^{1} [/tex]A sequence is Geometric if there exist a number r, called the common ratio. A sequence is Arithmetic if there exist a number d, called the distance.