Let f be the function graphed below. If six subintervals of equal length are used, draw rectangles whose area represents a right Riemann sum approximation of [ƒ(x) dx. Width of each subinterval: 18 y 14 12 10 8 6 4 2 3 go The shaded area above, representing a right Riemann sum, is an .3 ✓of the integral f(a) da because the function is on the interval 0 < x < 3.

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