Finding missing terms in geometric sequence - 1 to 5

This is part 1 of the video tutorials about finding the missing terms in geometric sequence.

To find a missing term in geometric sequence we use the formula an=a1r(exp(n-1)).

This is true if there are no consecutive terms present. But if there are consecutive terms it is easier to use an=asub(n-1)r.

The r is the common ratio and it is find by dividing a term over the previous term.

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[stop.using.my.acc.dummass]

What if we don't have consecutive terms?