What is the sum of the arithmetic sequence 140, 134, 128…, if there are 33 terms?

Question

lgbasallote · Answer

sum of arithmetic sequence formula $$\large S_n = \frac{n(A_1 + A_n)}{2}$$ where Sn is the sum of series
n is the number of terms
a1 is the first term
an is the last term

does that help?

lgbasallote · Answer

you might also wanna know the formula for the nth term formula $$\large a_n = a_1 + (n-1)d$$ where An is the nth term (in this case you wanna know 33rd term)
n is the number of terms
A1 is the first term
d is the difference between the second term and the first term

anonymous · Answer

What's the answer? I tried solving it but I got the wrong answer.

lgbasallote · Answer

how do you know it's wrong?

anonymous · Answer

Cause its a multiple choice question.

precal · Answer

why don't you post your work using the draw feature and we can tell you where you made your mistake