MATHEMATICS

JAMB 2001 - Question 20

Mathematics 2001 JAMB Past Questions - Question 20: If p=(3 -2 4) (5 0 6) ( 7 5 -1) ,then - 2P is

If p=(3 -2 4) (5 0 6) ( 7 5 -1) ,then - 2P is
A:
B:
C:
D:
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Correct Answer

C

Explanation

To find -2P, we need to multiply each element of matrix P by -2.Matrix P:P = [3 -2 4]    [5 0 6]    [7 5 -1]Multiplying each element by -2:-2P = [-2*3 -2*(-2) -2*4]        [-2*5 -2*0 -2*6]        [-2*7 -2*5 -2*(-1)]Simplifying:-2P = [-6 4 -8]        [-10 0 -12]        [-14 -10 2]Therefore, -2P is:[-6 4 -8][-10 0 -12][-14 -10 2]To find -2P, we need to multiply each element of matrix P by -2.Matrix P:P = [3 -2 4]    [5 0 6]    [7 5 -1]Multiplying each element by -2:-2P = [-2*3 -2*(-2) -2*4]        [-2*5 -2*0 -2*6]        [-2*7 -2*5 -2*(-1)]Simplifying:-2P = [-6 4 -8]        [-10 0 -12]        [-14 -10 2]Therefore, -2P is:[-6 4 -8][-10 0 -12][-14 -10 2]