[ \int_a^b f(x) , dx = \lim_n \to \infty \sum_i=1^n f(x_i^*) \Delta x ]
Sum: (\sum_i=0^n-1 4 = 4n,\ \sum_i=0^n-1 \frac6in = \frac6n \cdot \fracn(n-1)2 = 3(n-1)) sumas de riemann ejercicios resueltos pdf
Note: (\sin(5\pi/8) = \sin(3\pi/8),\ \sin(7\pi/8) = \sin(\pi/8)) [ \int_a^b f(x) , dx = \lim_n \to
Better: (R_n = \frac2n \sum_i=1^n (4 + \frac6in) = \frac2n[4n + \frac6n\cdot \fracn(n+1)2] = \frac2n[4n + 3(n+1)] = 14 + \frac6n) [ \int_a^b f(x)
Exact: (\int_0^\pi \sin x , dx = 2). So (M_4 \approx 1.896) (error (\approx 0.104)). Express (\lim_n \to \infty \frac1n \sum_i=1^n \left(1 + \fracin\right)^3) as an integral.
: [ R_4 = 0.5 [f(0.5) + f(1) + f(1.5) + f(2)] = 0.5 [0.25 + 1 + 2.25 + 4] = 0.5 \times 7.5 = 3.75 ]