MATLAB - Numerical Methods
What will be the output of this MATLAB code?
p = [1 0 -4];
val = polyval(p, 2);
disp(val);
What will be the output of this MATLAB code?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand polynomial and evaluation point
Polynomial is x^2 - 4, evaluated at x=2.Step 2: Calculate value
polyval(p, 2) = 2^2 - 4 = 4 - 4 = 0.Final Answer:
0 -> Option CQuick Check:
polyval(p, 2) = 0 [OK]
Quick Trick: Calculate polynomial value by substituting x [OK]
Common Mistakes:
- Forgetting to square 2
- Mixing coefficient order
- Using roots() instead of polyval()
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