All Algebra II Resources
Example Questions
Example Question #19 : Natural Log
Evaluate:
The natural log has a default base of .
This means that:
According to the property of logs, , and will equal just the power.
Simplify the expression.
The answer is:
Example Question #20 : Natural Log
Evaluate:
Simplify the first term. The natural log has a default base of .
According to log rules:
This means that:
The answer is:
Example Question #21 : Natural Log
Solve:
In order to eliminate the natural log, which has a base of , we will need to raise both side as powers of .
The equation can be simplified to:
Add on both sides.
Divide by two on both sides.
The answer is:
Example Question #22 : Natural Log
Try without a calculator:
Which expression is not equivalent to 1?
is the correct choice.
For all for which the expressions are defined,
.
Setting , this equation becomes
- that is, the one thousandth root of 1,000. This is not equal to 1, since if it were, it would hold that - which is not true.
Of the other four expressions:
, the common, or base ten, logarithm of 10, can be rewritten as , and , the natural, or base , logarithm of , can be rewritten as . A property of logarithms states that for all , . Therefore, and .
, since any nonzero number raised to the power of 0 is equal to 1.
By the Power of a Power Property,
, so
Example Question #1 : Logarithms
Based on the definition of logarithms, what is ?
10
2
4
100
3
3
For any equation , . Thus, we are trying to determine what power of 10 is 1000. , so our answer is 3.
Example Question #1 : Log Base 10
Evaluate .
Take the common logarithm of both sides, and take advantage of the property of the logarithm of a power:
Example Question #2921 : Algebra Ii
What is the value of ?
Base-10 logarithms are very easy if the operands are a power of . Begin by rewriting the question:
Becomes...
because
Applying logarithm rules, you can factor out the :
Now, is .
Therefore, your answer is .
Example Question #1 : Log Base 10
What is the value of ?
Round to the nearest hundreth.
Base-10 logarithms are very easy if the operands are a power of . Begin by rewriting the question:
Becomes...
because
Applying logarithm rules, you can factor out the :
Now, is .
Therefore, your answer is .
Example Question #1 : Log Base 10
Many textbooks use the following convention for logarithms:
What is the value of ?
Remember:
is the same as saying .
So when we ask "What is the value of ?", all we're asking is "10 raised to which power equals 1,000?" Or, in an expression:
.
From this, it should be easy to see that .
Example Question #1 : Log Base 10
Evaluate the following expression:
Without a subscript a logarithmic expression is base 10.
The expression
The logarithmic expression is asking 10 raised to what power equals 1000 or what is x when
We know that
so