Write the Riemann sum that would approximate the area of the following graph over the interval [0,3] using 3 subintervals.
A
8
B
12
C
24
D
6
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1
Step 1: Understand the problem. We are tasked with writing the Riemann sum to approximate the area under the curve of the function f(x) = x³ - 3x + 2 over the interval [0,3] using 3 subintervals.
Step 2: Divide the interval [0,3] into 3 equal subintervals. The width of each subinterval (Δx) is calculated as Δx = (3 - 0)/3 = 1.
Step 3: Determine the x-values at the endpoints of the subintervals. These are x₀ = 0, x₁ = 1, x₂ = 2, and x₃ = 3.
Step 4: Choose the sample points within each subinterval. For simplicity, we can use the right endpoints of each subinterval: x₁ = 1, x₂ = 2, and x₃ = 3.
Step 5: Write the Riemann sum formula. The Riemann sum is given by Σ f(xᵢ)Δx, where xᵢ are the sample points. Substituting the values, the sum becomes f(1)Δx + f(2)Δx + f(3)Δx, with Δx = 1.