# How do you find the fourth partial sum of #Sigma 8(-1/4)^n# from n=1 to #oo#?

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To find the fourth partial sum of the series ( \sum_{n=1}^{\infty} 8(-1/4)^n ), you plug in the first four terms of the series into the formula and sum them up. The formula for the nth term of the series is ( a_n = 8(-1/4)^n ). Plugging in ( n = 1, 2, 3, ) and ( 4 ) into this formula will give you the first four terms of the series. Then, you simply add these four terms together to find the fourth partial sum.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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