What do i put on # 12 and 14

#12 is 1 ⅞ and #14 is 3 ⅖

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?

Do you need with the x value for the minimum? its always between the two intercepts for a parabola