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SAT Math 7.2 Algebra and Functions 206 Views
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Description:
SAT Math 7.2 Algebra and Functions
Transcript
- 00:02
Put this in your calculator and shmoop it...
- 00:05
If 1.5 times 10 to the fourth all to the x power equals 1,
- 00:09
then x must be which of the following?
- 00:11
And here are the potential answers...
- 00:15
So... even though we have a ton of parentheses and numbers here,
Full Transcript
- 00:18
this is really a pretty simple question.
- 00:21
Ignore the numbers inside the parentheses for now.
- 00:27
Instead, let's ask ourselves this question:
- 00:29
When do we ever deal with exponents and have the result be... 1?
- 00:34
The answer?
- 00:35
ANY number to the ZERO power gives a result of 1.
- 00:39
Really...any number. Even 1 billion to the zero power gives a result of 1.
- 00:44
So x must be equal to 0.
- 00:47
Which means that our answer is C.
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