Solving Logarithmic Equations using Technology

Question 1

What are the approximate solutions of the equation? Check all that apply.

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3111-10-05-20-06-task/mr001-1.jpg; Answer image: //media.edgenuity.com/EVresources/3111-10-05-20-06-task/mr001-4.jpg

Question 2

Question 2

Revolt · Accepted Answer

0.2

Question 3

Question 3

Revolt · Accepted Answer

-2.1; 0.2

Question 4

Solve log2x = log53 + 1 by graphing. Round to the nearest tenth.

Revolt · Accepted Answer

3.2

Question 5

Solve log2(x – 1) = log12(x – 1) by graphing.x =

Revolt · Accepted Answer

2

Question 6

Elsa tries to solve the following equation, and determines there is no solution. Is she correct? Explain. log2x = log2(3x + 5) + 4

Revolt · Accepted Answer

Using the change-of-base formula, graph y = ln(x)/ln(2) and y = ln(3x + 5)/ln(2) + 4. The graphs do not intersect. Algebraically, the equation gives x = -80/47, which is outside the domain x > 0. Therefore, the equation has no solution, and Elsa is correct.

Question 7

–2.8760–0.34770.71241.3738

Revolt · Accepted Answer

–0.3477

Question 8

2.3219–0.4307–2.32190.4307

Revolt · Accepted Answer

–2.3219

Question 9

The expression is the result of applying the change of base formula to a logarithmic expression. Which could be the original expression?

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3111-10-05-20-02-task/mc001-4.jpg

Question 10

Use the change of base formula to approximate the solution to log0.515 = 1 – 2x. Round to the nearest hundredth.

Revolt · Accepted Answer

2.45

Solving Logarithmic Equations using Technology Answers

More from this Course

TRY EDGENUITY HACKS