ECZ 2021 · O-Level Paper 2 · Question 5 — Matrices
Matrix P = 122-x.
(a(i)) Given that matrix P = 122-x, find the value of x for which the determinant of P is -3.[2]
Verified working — step 1
det P = (1)(-x) - (2)(2) = -x - 4(a(ii)) Hence, find the inverse of P.[2]
Verified working — step 1
With x = -1, P = 1221 and det P = 1 - 4 = …(b) Study the flowchart. Write a pseudocode corresponding to the flowchart programme.[5]
Verified working — step 1
Each flowchart shape becomes one pseudocode line: the terminals give Start and Stop, the parallelograms give t…The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
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