Algebra and Applications Test 2

© examsiri.com

Question : 24 of 40

Marks: +1, -0

If

x+a/x=b

, then the value of

{x^2+bx+a}/{bx^2-x^3}

is:

$a+b$
${2b}/a$
$b/ a$
$a b$

Solution:

x+a/x=b

x^2 - bx + a = 0

Adding

2bx

on both sides we get

x^2 + bx + a = 2bx

and

a = (bx - x^2)

Substituting these values in equation

{x^2+bx+a}/{bx^2-x^3}={2bx}/{ax}={2b}/a

© examsiri.com

Go to Question:

Prev Question

Next Question