What is the 9th term of this geometric sequence? 7,28,112,448

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asked Apr 20, 2019 156k views

1 Answer

Jonathan Lam · Answer 1 · 2019-04-27T05:27:58+0000

The common ratio is 28/7 = 4.
The formula for the n-th term is
.. an = 7*4^(n -1)

The 9th term is
.. a9 = 7*4^(9 -1) = 7*4^8
.. = 7*65,536
.. = 458,752

What is the 9th term of this geometric sequence? 7,28,112,448

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