Find the integral of x2 from x=-6 to x=0 using n=10 left-hand rectangles right-hand rectangles mid-point rectangles trapezoids lower rectangles upper rectangles of width Δx=1.6, that is: ∫−60 x2 dx
\(\sum_{k=1}^n f(a+k\Delta x)\Delta x = f(a+\Delta x)\Delta x + f(a+2\Delta x)\Delta x + \ldots + f(a+k\Delta x)\Delta x\)