Question

Find the sum of the first 33 terms of the arithmetic sequence whose first term is 3 and whose 33rd term is -253

Answer 1

This is statistics?

Answer 2

See, first term(a) = 3
last term is given here:
tn = -253

And you know it is 33rd term so n = 33

So use the formula:

\[t_n = a + (n - 1).d\]

Here, tn = 33, a = 3 n=33 can you now find d from here?/
if you can then tell me the value of d after finding..