08-04-2019
Mathematics

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What is 6Σ n=1 [4(-5)^n-1] equal to?

What is 6Σ n1 45n1 equal to class=

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08-04-2019

Answer:

-10416.

Step-by-step explanation:

This is a Geometric Series with first term 4 and common ratio -5.

Sum of 6 terms = a1 . (r^6 - 1 )/ ( r - 1)

= 4 *( (-5)^6 - 1) / (-5-1)

= -10416 (answer).

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