Since there are only 4 terms in the sum, it's not too much work to expand it as
Alternatively, we can use the well-known formulas
These sums start at n = 0, so in our given sum we will keep track of the 0-th term separately:
as expected.
3. A balloon with a small leak loses 0.5% of its volume each day. If it originally contained 40 liters of gas, what is the volum
1 answer:
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