Log Equations Lesson: 5 Slides

5 Slides • 6 Questions

1

Logarithmic Equations

2

3

Let's work this one together!

You CANNOT have a negative log.

Make sure you substitute your answer back in to check if it's a negative solution!

4

Multiple Choice

$\log_2\left(1-4n\right)=\log_2\left(2n+43\right)$

1

n=7

2

n=-7

3

n=21

4

n=-21

5

Multiple Choice

$\log_6\left(6-3w\right)=\log_6\left(-2w\right)$

1

NO SOLUTION

2

W=-6

3

W=5/6

4

W=6/5

6

Multiple Choice

$\log\left(y+5\right)+\log4=\log72$

1

y=63

2

no solution

3

y=-13

4

y=13

7

8

Let's do this one together!

9

Multiple Choice

$\log_3\left(4x+8\right)-7=-3$

1

$x=\frac{73}{4}$

2

no solution

3

$x=1$

4

$x=-1$

10

Multiple Choice

log(2x)+log(x-5)=2

You will get two answers. Substitute back in to see which is the correct answer!

1

x=10

2

x=5

3

x=10

4

x=-5

11

Multiple Choice

2logx-log4=2

1

No solution

2

x=20

3

x=-20

4

$x=\pm20$

Logarithmic Equations

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