f(x)=sqrt(X); x1=0, x2=9, n=9, h=1; f(0)=0

Left Riemann: i, x, f(x) × h

1, 0, 0 × 1 = 0

2, 1, 1 × 1 = 1

3, 2, 1.41421356 × 1 = 1.41421356

4, 3, 1.73205081 × 1 = 1.73205081

5, 4, 2 × 1 = 2

6, 5, 2.23606798 × 1 = 2.23606798

7, 6, 2.44948974 × 1 = 2.44948974

8, 7, 2.64575131 × 1 = 2.64575131

9, 8, 2.82842712 × 1 = 2.82842712

Total: 16.30600052603572

Midpoint: i, x, f(x) × h

1, 0.5, 0.70710678 × 1 = 0.70710678

2, 1.5, 1.22474487 × 1 = 1.22474487

3, 2.5, 1.58113883 × 1 = 1.58113883

4, 3.5, 1.87082869 × 1 = 1.87082869

5, 4.5, 2.12132034 × 1 = 2.12132034

6, 5.5, 2.34520788 × 1 = 2.34520788

7, 6.5, 2.54950976 × 1 = 2.54950976

8, 7.5, 2.73861279 × 1 = 2.73861279

9, 8.5, 2.91547595 × 1 = 2.91547595

Total: 18.053945891265528

Right Riemann: i, x, f(x) × h

0, 1, 1 × 1 = 1

1, 2, 1.41421356 × 1 = 1.41421356

2, 3, 1.73205081 × 1 = 1.73205081

3, 4, 2 × 1 = 2

4, 5, 2.23606798 × 1 = 2.23606798

5, 6, 2.44948974 × 1 = 2.44948974

6, 7, 2.64575131 × 1 = 2.64575131

7, 8, 2.82842712 × 1 = 2.82842712

8, 9, 3 × 1 = 3

Total: 19.30600052603572