Please somebody help

[spark narwhal]

So im trying to work on sequences and im having trouble on whats the difference between arithmetic and geometric sequences and what does it mean when it says its recursive or explicit? So yeah in this problem i have to figure out if a question is arithmetic or geometric and if the rule is recursive or explicit

[whole obsidian]

Arithmetic: increases by a constant (like a linear function)
geometric: multiplies by a constant (like an exponential function
recursive: relies on previous terms of the previous sequence (like the fibbonaci sequence)
explicit: idk