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SAT Math 2.1 Algebra and Functions
272 Views

SAT Math 2.1 Algebra and Functions. What is g(h(4))?

SAT Math 2.3 Algebra and Functions
206 Views

SAT Math 2.3 Algebra and Functions. Calculate this function.

SAT Math 5.2 Algebra and Functions
200 Views

SAT Math 5.2 Algebra and Functions

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SAT Math 5.2 Algebra and Functions 200 Views


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Description:

SAT Math 5.2 Algebra and Functions

Language:
English Language

Transcript

00:02

And here's your shmoop du jour...

00:04

If g(n) = 4n squared - 9 and h(n) = the square root of n,

00:10

what is g of h of n?

00:14

Here are the possible answers...

00:18

g of h of n? No, those parentheses aren't just there to distract us.

00:26

Actually, they tell us we're working with composite functions.

00:30

To solve this problem, we need to plug h of n in for the n in the g of n equation:

00:37

to get 4 times the square root of n squared minus 9.

00:40

The square root of n squared simplifies to n...

00:44

so our equation becomes g of h of n equals 4n minus 9.

00:49

Looks like our answer's B.

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