Question

solve the determinant A:
A = 4 8 2
0 3 5
2 3 1
​

Answer 1

Answer:

Question 1:

Evaluate the determinants in Exercises 1 and 2.

ANSWER:

= 2(−1) − 4(−5) = − 2 + 20 = 18

Page No 108:

Question 2:

Evaluate the determinants in Exercises 1 and 2.

(i) (ii)

ANSWER:

(i) = (cos θ)(cos θ) − (−sin θ)(sin θ) = cos2 θ+ sin2 θ = 1

(ii)

= (x2 − x + 1)(x + 1) − (x − 1)(x + 1)

= x3 − x2 + x + x2 − x + 1 − (x2 − 1)

= x3 + 1 − x2 + 1

= x3 − x2 + 2

Step-by-step explanation:

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