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Question Number 146856 by cdment last updated on 16/Jul/21

      Δx=((3−(−5))/n) ⇒(8/n)  ∴ x_0 =−5    ∴ a=x_0 =−5              x_1 =−5+1Δx              x_2 =−5+2Δx              x_3 =−5+3Δx                ⋮               x_n =−5+nΔx

$$ \\ $$ 3. Calcula mediante una suma de Riemann una aproximaci´on al ´area limitada por la funci´on f(x) = −2x 2 − 4x + 30 y el eje x en el intervalo [−5, 3] con n rect´angulos.\\n$$ \\ $$ $$\Delta{x}=\frac{\mathrm{3}−\left(−\mathrm{5}\right)}{{n}}\:\Rightarrow\frac{\mathrm{8}}{{n}} \\ $$ $$\therefore\:{x}_{\mathrm{0}} =−\mathrm{5} \\ $$ $$ \\ $$ $$\therefore\:{a}={x}_{\mathrm{0}} =−\mathrm{5} \\ $$ $$\:\:\:\:\:\:\:\:\:\:\:\:{x}_{\mathrm{1}} =−\mathrm{5}+\mathrm{1}\Delta{x} \\ $$ $$\:\:\:\:\:\:\:\:\:\:\:\:{x}_{\mathrm{2}} =−\mathrm{5}+\mathrm{2}\Delta{x} \\ $$ $$\:\:\:\:\:\:\:\:\:\:\:\:{x}_{\mathrm{3}} =−\mathrm{5}+\mathrm{3}\Delta{x} \\ $$ $$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\vdots \\ $$ $$\:\:\:\:\:\:\:\:\:\:\:\:\:{x}_{{n}} =−\mathrm{5}+{n}\Delta{x} \\ $$ $$ \\ $$

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