Q. Find the value of the following expression and round to the nearest integer:n=0∑98100(1.01)nAnswer:
Recognize Given Expression: We recognize that the given expression is a geometric series with the first term a=100 and the common ratio r=1.01. The sum of a finite geometric series can be calculated using the formula Sn=(1−r)a(1−rn), where n is the number of terms.
Determine Number of Terms: First, we need to determine the number of terms in the series. Since the series starts at n=0 and goes up to n=98, there are a total of 99 terms (we include the starting term).
Plug Values into Formula: Now we can plug the values into the sum formula for a geometric series: Sn=(1−1.01)100(1−1.0199).
Calculate Power: We calculate the power 1.0199 using a calculator to avoid any manual calculation error.
Substitute Power into Formula: After calculating the power, we substitute it back into the formula: Sn=100(1−1.0199)/(1−1.01).
Perform Subtraction: We perform the subtraction in the numerator and the denominator: Sn=(−0.01)100(1−1.0199).
Simplify Expression: We multiply the numerator and denominator by −100 to simplify the expression: Sn=−10000(1−1.0199).
Calculate Value: We calculate the value of the expression −10000(1−1.0199) using a calculator to ensure accuracy.
Round Result: Finally, we round the result to the nearest integer as the question prompt asks for the rounded value.
More problems from Sum of finite series starts from 1