Find the 23rd term in the arithmetic sequence -1,-9,-17,-25,-33

= - 177

Step-by-step explanation:

The n th term formula for an arithmetic sequence is

= a + (n - 1)d

where a is the first term and d the common difference

d = - 9 - (- 1) = - 9 + 1 = - 8 and a = - 1, hence

= - 1 + (- 8 × 22) = - 1 - 176 = - 177

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