Barron's SAT Subject Test Math Level 2, 10th edition by Ku Richard

Author:Ku, Richard [Ku, Richard]
Language: eng
Format: epub
Tags: book, ebook
Publisher: Barron's Educational Series
Published: 2012-10-16T14:00:00+00:00

Matrix multiply both sides on the left by A–1:A–1AX = A–1B. This yields IX = X = A–1B = . The fractional form of the answer can be obtained by keying MATH/ENTER/ENTER.

EXERCISES

1. The determinant of is

(A) p – 6

(B) p + 6

(C) 3p – 2

(D) 3 – 2p

(E) –6 – p

2. Find all values of x for which .

(A) ±3.78

(B) ±4.47

(C) ±5.12

(D) ±6.19

(E) ±6.97

3. If , then X =

(A)

(B)

(C)

(D)

(E) undefined

SOLVING SYSTEMS OF EQUATIONS

An important application of matrices is writing and solving systems of equations in matrix form.

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