Question

function

Answer 1

the first term f(1) is -5.5

so just plug in n=1 in all the options,
and the one that gives you -5.5 will be your answer :)

Answer 2

i dont know hwether it a or b @hartnn

Answer 3

@clamin why you think option a or b?

Answer 4

because of the (n-1) @Palwandew

Answer 5

Solve the same function using n=1,2,3,4. If you get the same sequence as given in question. That'll be your answer.