Rational Expressions (Non-Permissible values)

Question 1

Find the non-permissible value for the expression:

1 / (x + 5)

Answer 1

Take denominator, set equal to 0 and solve.
x + 5 = 0

x + 5 = 0
-5 -5
x cannot equal -5

Question 2

Find the non-permissible value for the expression:

1 / (x -4)

Answer 2

x cannot equal 4

Question 3

Find the non-permissible value for the expression:

1 / (2x + 7)

Answer 3

x cannot equal -7/2

Question 4

Find the non-permissible value for the expression:

1 / (3x - 5)

Answer 4

x cannot equal 5/3

Question 5

Find the non-permissible value for the expression:

1 / (x + 7)

Answer 5

x cannot equal -7

Question 6

Find the non-permissible value for the expression:

1 / x

Answer 6

x cannot equal 0

Question 7

Find the non-permissible value for the expression:

1 / 2x

Answer 7

x cannot equal 0

Question 8

Find the non-permissible value for the expression:

1 / (3x + 1)

Answer 8

x cannot equal -1/3

Question 9

1 / (x^2)

Answer 9

x cannot equal 0