Q. Find the value of the following expression and round to the nearest integer:n=0∑66300(0.95)n+1Answer:
Given series information: We are given a geometric series with the first term a=300×0.95 and the common ratio r=0.95. The sum of a finite geometric series can be found using the formula Sn=(1−r)a(1−rn), where n is the number of terms. In this case, we have 67 terms (from n=0 to n=66).
Calculate first term: First, calculate the first term of the series: a=300×0.95.
Calculate 67th power of common ratio: Now, calculate the 67th power of the common ratio: r67=0.9567. This will be used in the formula for the sum of the series.
Substitute values into sum formula: Substitute the values of a, r, and n into the sum formula: S67=300×0.95×(1−0.9567)/(1−0.95).
Calculate numerator of fraction: Calculate the numerator of the fraction: 1−0.9567. This requires a calculator for an accurate result.
Calculate denominator of fraction: Calculate the denominator of the fraction: 1−0.95. This is straightforward and equals 0.05.
Divide numerator by denominator: Divide the numerator by the denominator to find the sum of the series: S67=300×0.95×(1−0.9567)/0.05.
Round to nearest integer: Finally, round the result to the nearest integer to get the final answer.
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