Recognize Riemann Sum: We recognize that the given series is a Riemann sum. The Riemann sum is used to approximate the integral of a function over an interval by partitioning the interval and summing up areas of rectangles under the curve. The general form of a Riemann sum is ∑i=1nf(xi)⋅(Δx), where Δx is the width of each partition and f(xi) is the function value at the ith partition. In our case, f(xi)=16x, and Δx=n1. We can rewrite the series as ∑i=1n(n216i)=∑i=1n(n216)⋅i. Here, n216 is constant for each term in the sum, and i represents the ith partition's contribution to the sum.
Express as Riemann Sum: We can now express the sum as a Riemann sum that approximates the integral of the function f(x)=16x from 0 to 1 as n approaches infinity. The Riemann sum becomes limn→∞(n216)⋅∑i=1ni. The sum ∑i=1ni is the sum of the first n natural numbers, which can be calculated using the formula 2n(n+1).
Substitute Formula: Substitute the formula for the sum of the first n natural numbers into the Riemann sum: limn→∞(n216)∗(2n(n+1)). This simplifies to limn→∞(n216)∗(2n2+2n).
Distribute Terms: Distribute n216 across the terms in the parentheses: limn→∞(216+2n216n). This simplifies to limn→∞(8+n8).
Take Limit: Now, take the limit as n approaches infinity. The term n8 approaches 0 as n becomes very large, so the limit is limn→∞(8+n8)=8+0.
Final Answer: The final answer is the limit of the sum, which is 8. This is the value of the integral of f(x)=16x from 0 to 1.
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