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3 years ago

What is the sum of the geometric sequence-1 6 -36 yes there are 7 terms

Mathematics

2 answers:

vagabundo [1.1K]3 years ago

7 0

Answer:

-39991'

Step-by-step explanation:

We require the sum of 7 terms of the G.S. -1, 6, -36 .....

The common ratio r = 6/-1 = -6 and the first term = -1.

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

Sum of 7 terms = -1 * (-6)^7 - 1) / (-6 - 1)

= -1 * 39991

= -39991 (answer).

amid [387]3 years ago

6 0

-39991 is the awnser

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