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Find the formula for the nth term of these sequences:

(a) 2, 5, 10, 17, 26, …….

(b) 4, 10, 20, 34, 52, ………

Part of a geometric sequence is given below:

,,,,, -1, ,,,, , ,,,,,, 64, ,,,,,

Where uₙ means the nth term, hence, u₂ = -1, and u₅ = 64.

Second term is -1, and the fifth term is 64. Calculate:

(a) The common ratio (r)

(b) The value of the first term (a) or u₁

(c) The value of the 10th term.

I need it by today!! and please for the people who type to get points please dont do it with me

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pedrofrifas14

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