Find the common ratio for the geometric sequence for which a_1=3 and a_5=48. A. -3 B. -2 C. 3 D. 2

Question

Find the common ratio for the geometric sequence for which
`a_1`=3 and
`a_5`=48. A. -3 B. -2 C. 3 D. 2

Answer 1

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Answer 2

An= A1 * r^n-1

A5= 3 * r^5-1

48= 3*r^4

48÷3=r^4

16=r^4

r=

`\sqrt[4]{16}`

r=2

The answer is D. 2

Espero que te sirva