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Evaluate f(x)=e4x+5+2 when x=−2. Give an approximate answer rounded to two decimal places.

Evaluate f(x)=e4x+5+2 when x=−2. Give an approximate answer rounded to two decimal-example-1
User Chriad
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6.0k points

2 Answers

6 votes

The value of f(-2) is 2.00.

To evaluate the function (f(x) = e^{4x+5} + 2) when (x = -2), we can simply substitute (-2) for (x) in the function and calculate the value.

f(x) = e^(4x + 2) + 2

At x = -2

f(-2) = e^(4(-2) + 2) + 2

f(-2) = e^(-8 + 2) + 2

f(-2) = e^(-6) + 2

Using a calculator

f(-2) = 0.002478752176666 + 2

f(-2) = 2.002478752176666

Rounded to 2 decimal point we get,

f(-2) ≈ 2.00

User Supersambo
by
6.2k points
5 votes

Answer:

f(-2) ≈ 2.00

Explanation:

f(x) = e^(4x + 2) + 2

At x = -2

f(-2) = e^(4(-2) + 2) + 2

f(-2) = e^(-8 + 2) + 2

f(-2) = e^(-6) + 2

use calculator

f(-2) = 0.002478752176666 + 2

f(-2) = 2.002478752176666

Rounded to 2DP

f(-2) ≈ 2.00

User Stevie
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6.0k points