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disp ("Question 1:");
disp ("(a)");
printf ("11^3 + 12^3 - 7^3 = %d\n", 11^3 + 12^3 - 7^3);
printf ("15! = %d\n", factorial (15));
disp ("(b)");
A = [1 2 3
4 5 6
7 8 9];
B = eye (3);
disp ("(b.i)");
disp ("A + B = ");
disp (A + B);
disp ("(b.ii)");
disp ("A' = ");
disp (A');
disp ("(b.iii)");
disp ("A^-1 = ");
disp (inv (A));
disp ("(c.i)");
printf ("x^2 = 19 -> x = %g\n", sqrt (19));
disp ("(c.ii)");
printf ("x^4 = 55 -> x = %g\n", sqrt (sqrt (19)));
disp ("(d)");
X = 0 : 30;
Y = X * 2 + 3;
plot (X, Y);
xlabel ("x");
ylabel ("y = 2x + 3");
disp ("Press any key to continue...");
kbhit;
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