What is the value of a1 of the geometric series?

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Question:

What is the value of a1 of the geometric series?

a. -12/9
b. -1/9
c. 1
d. 12

Answer:

ANSWER

EXPLANATION

We were given the geometric series,

This implies that, the nth term is

To find the first term, we put

in to the nth term.

This implies that,

We simplify to obtain,

We know that, any non zero number raised to the power zero is 1.

This simplifies to,

The correct answer is option D

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