Let f be the function defined by f(x)=5x. If six subintervals of equal length are used, what is the value of the right Riemann sum approximation for ∫01.55xdx ? Round to the nearest thousandth if necessary.Answer:
Q. Let f be the function defined by f(x)=5x. If six subintervals of equal length are used, what is the value of the right Riemann sum approximation for ∫01.55xdx ? Round to the nearest thousandth if necessary.Answer:
Divide into Subintervals: To approximate the integral using a right Riemann sum, we first need to divide the interval [0,1.5] into six equal subintervals. This means each subinterval will have a length of (1.5−0)/6.
Calculate Subinterval Length: Calculate the length of each subinterval: (1.5−0)/6=0.25.
Identify Endpoints: Identify the endpoints of each subinterval. Since we are using a right Riemann sum, we will use the right endpoint of each subinterval to evaluate the function. The endpoints are: 0.25, 0.5, 0.75, 1.0, 1.25, and 1.5.
Evaluate Function at Endpoints: Evaluate the function f(x)=5x at each of the right endpoints of the subintervals: f(0.25), f(0.5), f(0.75), f(1.0), f(1.25), f(1.5).
Calculate Function Values: Calculate the value of the function at each endpoint:f(0.25)=50.25,f(0.5)=50.5,f(0.75)=50.75,f(1.0)=51.0,f(1.25)=51.25,f(1.5)=51.5.
Calculate Rectangle Areas: Multiply each function value by the length of the subintervals 0.25 to get the area of each rectangle in the Riemann sum: Area1=0.25×50.25,Area2=0.25×50.5,Area3=0.25×50.75,Area4=0.25×51.0,Area5=0.25×51.25,Area6=0.25×51.5.
Add Rectangle Areas: Add up the areas of all rectangles to get the right Riemann sum approximation:Right Riemann Sum = Area1+Area2+Area3+Area4+Area5+Area6.
Perform Calculations: Perform the calculations to find the sum: Right Riemann Sum = 0.25×50.25+0.25×50.5+0.25×50.75+0.25×51.0+0.25×51.25+0.25×51.5.
Use Calculator: Use a calculator to find the numerical values of each term and sum them up:Right Riemann Sum ≈0.25×2.378414+0.25×2.236068+0.25×3.343702+0.25×5+0.25×7.450580+0.25×11.180340.
Calculate Numerical Values: Calculate the sum:Right Riemann Sum ≈0.25×2.378414+0.25×2.236068+0.25×3.343702+0.25×5+0.25×7.450580+0.25×11.180340≈0.5946035+0.559017+0.8359255+1.25+1.862645+2.795085≈7.897276.
Calculate Sum: Round the result to the nearest thousandth: Right Riemann Sum ≈7.897.
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