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Mathematics

Grade10

Easy

Question

What is the common ratio of the given explicit formula of a geometric sequence?
$a subscript n end subscript equals 4 open parentheses 5 close parentheses to the power of n minus 1 end exponent$

9
4
5
1

hint Hint:

The explicit formula is, $a subscript n end subscript equals a subscript 1 end subscript cross times open parentheses r close parentheses to the power of n minus 1 end exponent$

The correct answer is: 5

Using the explicit formula, $a subscript n end subscript equals a subscript 1 end subscript cross times open parentheses r close parentheses to the power of n minus 1 end exponent$
So, the common difference of the given sequence is 5.

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