Four positive numbers form a geometric sequence. the sum of the four numbers is one more then the common ratio. if the first number is 1/10, find the common ratio.

r=3 where r is the common ratio

Step-by-step explanation:

The sum of geometric progression for n terms is given by:

, where is the

first term of the series and r is the common ratio.

Now, according to the question, there are four terms and they form a geometric progression. So sum of four terms is given as and .

Also according to the above formula:

Using the values as given in the question into the above equation we get:

[ Using formula ]

which is the required answer.

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i'm not entirely sure

step-by-step explanation:

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