Lol could someone help me with questions 75,77,and 81

Question

asked Jan 27, 2019 99.8k views

1 Answer

Qadenza · Answer 1 · 2019-02-02T09:53:07+0000

75 . Rukle for this sequence is

nth term = -7 + 5/2(n - 1)

(The image is not very clear Im not sure if the common difference is 5/2 or 3/2)

I cant make out 77 or 81.