Ask a New Question

how many terms of the arithmetic sequence -5,-1,3,… must be added to reach the sum of 400

1 answer

a = -5
d = 4

So,

n/2 (-10+4(n-1)) = 400
n = 16

Ask a New Question or answer this question.

Similar Questions

The 1st, 5th and 13th terms of an arithmetic sequence are the first three terms of a geometric sequence with a common ratio 2.
1. 32 answers
p+3; 2p - 3; p - 5using arithmetic sequence how many terms of the sequence must be added to give a sum of -984
1. 1 answer
Consider the arithmetic sequence -1/5;-11/5;21/5;...1. Calculate the sum of the first 30 terms of this sequence. Calculate the
1. 1 answer
Determine whether sequence appears to be an arithmetic sequence. If so, find the common difference and the next three terms in
1. 1 answer

more similar questions