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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

1. Exponential Functions

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Exercise 3 Page 274

Substitute - 2, 0, and 12 for x.

≈ 0.0247, 2, 6

Practice makes perfect

We are given a function and asked to evaluate it for some given values. x=- 2, 0, 1/2This means that we should substitute - 2, 0, and 12 for x in the given function and then evaluate. Let's start with - 2.

y=2(9)^x

x= - 2

y=2(9)^(- 2)

NegExponentToFrac

a^(- m)=1/a^m

y=2(1/9^2)

Calculate power

y=2(1/81)

MoveLeftFacToNum

a*b/c= a* b/c

y=2/81

Use a calculator

y=0.02469135802

Round to 4 decimal place(s)

y≈ 0.0247

Now, let's do the same thing for the rest of the values.

x	Evaluation	Result
- 2	2(9)^(- 2)	≈ 0.0247
0	2(9)^0	2
1/2	2(9)^(12)	6

Subchapter links

Communicate Your Answer p.273

Monitoring Progress p.274-277

Exercises p.278-280