Question

Find S(subscript)25 for -7+ -2 + 3 + 8 +...
@Hero

Answer 1

Use the arthimetic formula for sequence. You already know the value of d.

Answer 2

I'm not sure how to do that... Math is not my strongest subject.

Answer 3

1. Write the arithmetic formula for sequence:
\(a_n = a_1 + (n - 1)d\)
2. Input the value of \(d\) (the difference between consecutive terms)
3. Input the value of \(a_1\) (the first term of the sequence)
4. You're looking for \(a_{25}\) (the 25th term of the sequence) so \(n = 25\).
5. Compute the value of \(a_{25}\)

Answer 4

@yowzaman how's it going?

Answer 5

Sorry, I was eating dinner.

Answer 6

I got 113.

Answer 7

@Hero

Answer 8

Would you mind showing the work you did to get that?

Answer 9

a(subscript)25=-7+(25-1)5

Answer 10

Okay, that looks right.

Answer 11

So 113 is my answer?