Write the recursive and explicit formulas for the following sequences?

19, 21.5, 24, .....

explicit formula

an=a1+(n-1)d

an=19+(n-1)2.5

an=19+2.5n-2.5

a4=19+(2.5*4)-2.5

26.5

what about recrusve

a1=19

an=an-1

n=2.....a2=19+2.5=21.5

n3.........=21.5+2.5=24

n=4.......=24+2.5=26

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