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Numbers and Operations Videos 45 videos

SAT Math 1.3 Numbers and Operations
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SAT Math 1.3 Numbers and Operations. x and y must be which of the following?

SAT Math 2.4 Numbers and Operations
384 Views

SAT Math 2.4 Numbers and Operations

SAT Math 3.6 Numbers and Operations
208 Views

SAT Math 3.6 Numbers and Operations

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SAT Math 2.5 Algebra and Functions 194 Views


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Description:

SAT Math 2.5 Algebra and Functions

Language:
English Language

Transcript

00:02

Put this in your calculator and shmoop it...

00:04

In a sequence, each subsequent term, n, is determined by the formula t sub n equals the

00:11

quantity t sub n minus 1 squared.

00:14

If the first term is the square root of x, what is the fourth term?

00:18

And here are the potential answers...

00:24

This one is just a "fill in the missing numbers of the pattern" problem,

00:27

but, we have to figure out what the pattern actually is...

00:32

So the formula for the pattern is t sub n equals t sub n minus 1 squared.

00:37

Hmm, lot of variables to just say: "any term equals the term before it squared."

00:42

The first number is given.

00:43

All we have to do is find the next numbers in the pattern.

00:47

The first number, squared, should give us the second number of the pattern.

00:51

The square root of x squared equals x.

00:54

The second number squared equals the third number.

00:57

X squared equals...x squared.

01:00

And the third number squared equals the fourth number.

01:03

Remember your exponent rules here... when an exponent is being raised

01:06

to another power, multiply the two powers together.

01:09

So x squared squared equals x to the power of 2 times 2, which is x to the power of 4.

01:16

So D is the correct answer.

01:33

Man... we would kill it playing Simon...

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