1 files changed, 16 insertions, 0 deletions
diff --git a/usth/MATH2.4/final/EX3.m b/usth/MATH2.4/final/EX3.m
new file mode 100644
index 0000000..99240f8
--- /dev/null
+++ b/usth/MATH2.4/final/EX3.m
@@ -0,0 +1,16 @@
+disp ("Question 3:");
+disp ("(a)");
+function y = f (x)
+  y = 2 + x.^2 + exp(x.*2 + 1);
+endfunction
+h = 0.005;
+printf ("By forward difference with h = 0.05, f'(1.35) = %g\n",
+        (f (1.35 + h) - f (1.35)) / h);
+
+disp ("(b)");
+disp ("I am unsure if diff is different on Matlab, but on octave,");
+disp ("it's simply taking differences between consecutive elements.");
+x = [1.35, 1.35+h];
+printf ("Using diff with h = 0.05, we get same result, f'(1.35) = %g\n",
+        (diff (f (x)) / h));
+disp ("Using symbolical methods, f'(1.35) = 83.5946 which is quite close.");