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Popular >

sum from n=1 to infinity of 0.8^n

Solution

n = 1 \sum \infty 0. 8^{n}

Solution

4

Solution steps

n = 1 \sum \infty 0. 8^{n}

n = k \sum \infty (a_{n}) = n = 0 \sum \infty (a_{n}) - a_{0} - a_{1} - \dots a_{k - 1}

= n = 0 \sum \infty 0. 8^{n} - 0. 8^{0}

n = 0 \sum \infty 0. 8^{n} = 5

= 5 - 0. 8^{0}

Simplify

= 4

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Frequently Asked Questions (FAQ)

What is the sum from n=1 to infinity of 0.8^n ?
The sum from n=1 to infinity of 0.8^n is 4