Ask a New Question

The 10th term of an Arithmetic Progressions is -27 and the 5th term is -12, what is the 18th term? Find also the sum of its 25 terms.

1 answer

a + 4d = -12
a + 9d = -27
clearly, d = -3, so use that to find a, and then find
T18 = T10 + 8d = -27 - 24 = -51
S25 = 25/2 (2a + 24d) = _____

Ask a New Question or answer this question.

Similar Questions

in an arithmetic progressions if sum of x th term is equal to 7x square - 8x then 10th term is
1. 1 answer
Determining the first three terms of an ArithmetiC progressionof which the (a.)10th term is 31 and the 15th term is 49 (b.)7th
1. 1 answer
The fifth term of an arithmetic sequence is 23 and the 12th term is 72. And they say first question 1.determine the first three
1. 3 answers
1.The tenth term of an arithmetic progression is68 and the common difference is 7 find the term2.the second term of an
1. 1 answer

more similar questions