hw4: corrected 2, done 1 and 2

Claudio_Maggioni_4/Claudio_Maggioni_4.md

@@ -67,8 +67,8 @@ $$c(x) = \left( \frac{1}{3+\lambda} \right)^2 + \left( -\frac{1}{1-\lambda} \rig
 (\lambda^4 - 6\lambda^3 + 13\lambda^2 - 12\lambda + 16) +
 (\lambda^4 + 2\lambda^3 - 11\lambda^2 - 12\lambda + 36) +
 (\lambda^4 + 4\lambda^3 -  2\lambda^2 - 12\lambda + 9)$$$$
-+ (-\lambda^5 -14\lambda^4 +12\lambda^3 +49\lambda^2 -84\lambda + 36) = $$$$
++ (\lambda^6 -14\lambda^4 +12\lambda^3 +49\lambda^2 -84\lambda + 36) = $$$$
-=-\lambda^5 +17\lambda^4 -12\lambda^3 -49\lambda^2 +48\lambda +13 = 0
+=-\lambda^6 +17\lambda^4 -12\lambda^3 -49\lambda^2 +48\lambda +13 = 0
 \Leftrightarrow $$$$ \Leftrightarrow
 \lambda = \lambda_1 \approx -0.224 \lor
 \lambda = \lambda_2 \approx -1.892 \lor

Claudio_Maggioni_4/gsppn.m

@@ -1,8 +1,7 @@
 clc
-
+syms l
 X = [1/(3+l); (-1)/(1-l); (-1)/(2-l)] 
 
-syms l
 a1 = (3+l)^2;
 a2 = (1-l)^2;
 a3 = (2-l)^2;
@@ -12,12 +11,12 @@ t2 = a1*a3
 t3 = a1*a2
 t4 = a1*a2*a3
 
-c1 = fliplr(coeffs(t1))
+c1 = (coeffs(t1, 'All'))
-c2 = fliplr(coeffs(t2))
+c2 = (coeffs(t2, 'All'))
-c3 = fliplr(coeffs(t3))
+c3 = (coeffs(t3, 'All'))
-c4 = fliplr(coeffs(t4))
+c4 = (coeffs(t4, 'All'))
 
-ctot = fliplr(coeffs(t1+t2+t3-t4))
+ctot = coeffs(t1+t2+t3-t4, 'All')
 
 sol = double(solve(t1+t2+t3-t4==0, l, 'Real', true))