a1=5 and a6=-40 then find a8 term of the geometric sequence.

Q: a5 = -15 and a13 = -55 Find for the arithmetic sequence above: a21 =

A: Given:  a5=-15 and a13=-55 To Find:  To find a21 for the above arithmetic sequence.

Q: Find the infinite geometric sum if a1=-3, r=1\2

A:

Q: Find the next two terms of the sequence: 5,12,19,26,33,40

A: The difference between the numbers is as follows:

Q: Find ag and an for the arithmetic sequence. a1 =x, a2 =X+ 6

A:

Q: In a sequence:  a1= 3, a2= 7 and an= 2an-1+an-2 find a3, a4 and a5

A:

Q: Find the sum of the terms of an arithmetic sequence: 3+ 15+ 27+ 39... +615

A:

Q: Find the 96th term of the arithmetic sequence -30, -32, -34

A:

Q: Given a1 = 5 and a6 = 40 (the first and sixth numbers in an arithmetic sequence), find a20.

A:

Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.