Math Problem Statement

Use technology to evaluate $(f+g)(x)$ , $(f-g)(x)$ , $(fg)(x)$ , and $\left(\frac{f}{g}\right)(x)$ when $x=5$ for $f(x)=x^3+5x^2+x$ and $g(x)=4^x$ .

Round your answers to two decimal places.

$\left(f+g\right)\left(x\ \right)=$

$\left(f-g\right)\left(x\ \right)=$

$​(fg)(x)=$

$​\left(\frac{f}{g}\right)\left(x\right)\approx$

Solution

Define the functions f(x) and g(x) import math

def f(x): return x3 + 5*x2 + x

def g(x): return 4**x

Given value of x

x_value = 5

Compute (f+g)(x), (f-g)(x), (fg)(x), and (f/g)(x)

f_plus_g = f(x_value) + g(x_value) f_minus_g = f(x_value) - g(x_value) f_times_g = f(x_value) * g(x_value) f_divided_by_g = f(x_value) / g(x_value)

Round to two decimal places

f_plus_g_rounded = round(f_plus_g, 2) f_minus_g_rounded = round(f_minus_g, 2) f_times_g_rounded = round(f_times_g, 2) f_divided_by_g_rounded = round(f_divided_by_g, 2)

f_plus_g_rounded, f_minus_g_rounded, f_times_g_rounded, f_divided_by_g_roundedHere are the evaluated expressions at x=5x = 5:

  • (f+g)(5)=1279(f + g)(5) = 1279
  • (fg)(5)=769(f - g)(5) = -769
  • (fg)(5)=261120(fg)(5) = 261120
  • (fg)(5)0.25\left( \frac{f}{g} \right)(5) \approx 0.25

Would you like to explore further details or have any questions about these results?

Here are some related questions for you:

  1. How would the values change if x=6x = 6?
  2. What happens if we calculate these expressions with different values for the functions f(x)f(x) and g(x)g(x)?
  3. Can we calculate the derivative of these functions (f+g)(x)(f+g)(x) or (fg)(x)(fg)(x)?
  4. How would you evaluate these functions for complex numbers or negative values of xx?
  5. What is the significance of the quotient (fg)(x)\left( \frac{f}{g} \right)(x) being so small for x=5x = 5?

Tip: When dealing with complex expressions, using a systematic approach like breaking down each function step-by-step helps avoid calculation errors.

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Math Problem Analysis

Mathematical Concepts

Algebra
Functions
Operations on Functions
Exponential Functions

Formulas

(f+g)(x) = f(x) + g(x)
(f-g)(x) = f(x) - g(x)
(fg)(x) = f(x) * g(x)
(f/g)(x) = f(x) / g(x)

Theorems

Properties of Exponents
Function Operations

Suitable Grade Level

Grades 9-12