3 years ago

Must show work, please helppp

Mathematics

2 answers:

katrin [286]3 years ago

8 0

9514 1404 393

Answer:

1/2

Step-by-step explanation:

The base of the exponent tells us the common ratio of this geometric series is 1/2. The start value of n=7 tells us the first term in the series we're evaluating is ...

a1 = 2(1/2)^(7-4) = 2·(1/2)^3 = 2/8 = 1/4

The formula for the infinite sum of a geometric series is ...

S = a1(1/(1-r))

Filling in the values we know, this is ...

S = (1/4)(1/(1 -1/2)) = (1/4)(2) = 1/2

The infinite sum is 1/2.

katovenus [111]3 years ago

7 0

i can't see the photo.

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