SOLUTION: My problem says for me to identify and use geometric sequence. Find the 4th term of the geometric whose first term is 8 and whose common ratio is -3. a^4= I hope some one can hel

Question 449406: My problem says for me to identify and use geometric sequence. Find the 4th term of the geometric whose first term is 8 and whose common ratio is -3.
a^4=
I hope some one can help me. I don't even understand what the problem expects. Thank-you.
Answer by solver15(27) (Show Source): You can put this solution on YOUR website!
ok let start with the geometeric sequence, the formula for this is an = first term multipy by the ratio raise to power of n-1.
an= a1.r^n-1
an=4, r=-3, n=4
A^4 = 8(-3^4-1)
A^4 = 8(-3^3)
A^4 = 8(-27)
A^4 = -216 so your answer for the 4th term is -216

RELATED QUESTIONS
Find the 4th term of a geometric sequence whose first term is 6 and whose common ratio is (answered by mananth)

Find the requested term of the geometric sequence. the third term of a geometric... (answered by math_helper)

Find the third term of a geometric sequence whose first term is 3 and whose fifth term is (answered by josgarithmetic,MathTherapy)

The first term of a geometric sequence is 2, and the 4th term is 250. Find the 2 terms... (answered by ikleyn)

1. Find a formula for the nth term of the following sequence: 4, 12, 36, 108, 324, . . .... (answered by htmentor)

Find the nth term formula for the geometric sequence whose first term is 18 and whose... (answered by stanbon)

The first term of a geometric sequence is 1/8 and the 4th term is 8. What is the 6th... (answered by ewatrrr)

If the 4th term of a geometric sequence is 15 and the 7th term is 405, find the common... (answered by CubeyThePenguin)

Use the geometric mean to find the 7th term in a geometric sequence if the 6th term is 8... (answered by Edwin McCravy)