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It's super useful to be able to find the distance around stuff. Like when you’re being pursued by authorities while running around the base of an...
SAT Math 5.4 Algebra and Functions 319 Views
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Description:
SAT Math 5.4 Algebra and Functions
- Algebra and Functions / Solving Quadratic Equations by Factoring
- Product Type / SAT Math
- Functions / Build new functions from existing functions
- Functions / Build new functions from existing functions
- Algebra / Write expressions in equivalent forms to solve problems
- Algebra / Write expressions in equivalent forms to solve problems
- Algebra / Write expressions in equivalent forms to solve problems
- Functions / Build new functions from existing functions
- Functions / Build new functions from existing functions
- Passport to Advanced Math / Quadratic and exponential functions (word problems)
Transcript
- 00:02
Gettin' shmoopy with it...
- 00:04
If g of x = the square root of x - 1 to the fourth...what is g of x + 1?
- 00:09
And here are the potential answers...
- 00:14
We're working with composite functions, so all we have to do for this is replace the
- 00:19
instances of x in the first equation with x + 1.
Full Transcript
- 00:24
g of x + 1 = the square root of x + 1 - 1 all to the fourth.
- 00:33
Using the order of operations, we have to deal with the inside of the parentheses first...
- 00:40
So we get, x + 1 - 1 = just x.
- 00:44
So the square root of x to the 4th is just...x squared.
- 00:49
Looks like our answer's A.
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