Q. Find the value of the following expression and round to the nearest integer:n=1∑36700(0.98)nAnswer:
Recognize Geometric Series: Recognize that the given expression is a geometric series. The general form of a geometric series is ∑n=0∞arn, where a is the first term, r is the common ratio, and n is the term number. In this case, a=700 and r=0.98.
Use Sum Formula: Use the formula for the sum of the first n terms of a geometric series, which is Sn=1−ra(1−rn), where Sn is the sum of the first n terms.Here, n=36, a=700, and r=0.98. We will plug these values into the formula to find the sum.
Calculate with Values: Calculate the sum using the formula.S36=700(1−0.9836)/(1−0.98)First, calculate 0.9836 using a calculator.
Calculate 0.9836: Calculate 0.9836. 0.9836≈0.4873 (rounded to four decimal places for simplicity)
Substitute Back: Substitute 0.9836 back into the sum formula.S36=700(1−0.4873)/(1−0.98)Now, calculate 1−0.4873.