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3 years ago

Find the sum of the geometric sequence -3,15,-75,375,... when there are 7 terms and select the correct answer below.

Mathematics

1 answer:

vivado [14]3 years ago

8 0

Answer:

-39,063

Step-by-step explanation:

In this geometric, sequence, you are multiplying by -5. So, we can continue the sequence by mulitplying 375(your last value) by -5 and so on, until we have 7 total terms.

Now we add the terms together:

-3+15+-75+375+-1875+9375+-46875

=-3+15-75+375-1875+9375-46875

=-39063

Hope this helps :)

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Step-by-step explanation:

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Let us find the number of sheets given to students by Noor by multiplying the total number of students by the part of sheet given to each student.

$\text{Number of sheets given to 45 students}=45\times \frac{1}{3}$

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So, Noor gave 15 sheets to 45 students.

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