How do you find the first five terms of the geometric sequence $a_{1} = 1$ $a_1=1$ and r=4?

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Answer 1 · 2016-12-02T17:16:22

See explanation.

In a geometric sequence every term (except the first one) can be calculated by multiplying the previous one by $r$ $r$ , so:

$a_{1} = 1$ $a_1=1$

$a_{2} = a_{1} \times r = 1 \times 4 = 4$ $a_2=a_1xxr=1xx4=4$

$a_{3} = a_{2} \times r = 4 \times 4 = 16$ $a_3=a_2xxr=4xx4=16$

$a_{4} = a_{3} \times r = 16 \times 4 = 64$ $a_4=a_3xxr=16xx4=64$

and so on.

How do you find the first five terms of the geometric sequence a_1=1a1=1a_1=1 and r=4?