Chapter 11.10, Problem 7P

Computer plot graphs of

(a) $E_n(x)$ for $n=0$ to 10 and $x=0$ to 2;

(b) $E_1(x)$ and $\text{Ei}(x)$ for $x=0$ to 2

(c) the sine integral and the cosine integral $\text{Ci}(x)=-{\displaystyle {\int }_x^{\infty }\frac{\cos t}{t}}dt$ for $x=0$ to $4\pi$