Math Problem Statement

Let dy/dx = 7x^13 + 10 - 5e^x. Solve the differential equation and find the general solution. Also, solve the initial value problem where the solution curve passes through (0, 37).

Solution

The differential equation provided in the image is:

dydx=7x13+105ex\frac{dy}{dx} = 7x^{13} + 10 - 5e^x

Part A: General Solution

To solve the differential equation, we integrate both sides with respect to xx:

y=(7x13+105ex)dxy = \int \left( 7x^{13} + 10 - 5e^x \right) dx

Breaking it down:

  • 7x13dx=7x1414=x142\int 7x^{13} dx = \frac{7x^{14}}{14} = \frac{x^{14}}{2}
  • 10dx=10x\int 10 dx = 10x
  • 5exdx=5ex\int -5e^x dx = -5e^x

Therefore, the general solution is:

y=x142+10x5ex+Cy = \frac{x^{14}}{2} + 10x - 5e^x + C

where CC is the constant of integration.

Part B: Initial Value Problem (IVP)

We are given that the solution curve passes through the point (0,37)(0, 37), meaning when x=0x = 0, y=37y = 37. Substituting x=0x = 0 and y=37y = 37 into the general solution:

37=0142+10(0)5e0+C37 = \frac{0^{14}}{2} + 10(0) - 5e^0 + C 37=0+05+C37 = 0 + 0 - 5 + C C=37+5=42C = 37 + 5 = 42

Thus, the particular solution is:

y=x142+10x5ex+42y = \frac{x^{14}}{2} + 10x - 5e^x + 42

Would you like more details or further clarifications? Here are 5 related questions you might explore:

  1. How can we verify that this solution satisfies the original differential equation?
  2. What would happen if the differential equation included a different initial condition?
  3. Can this solution be expressed in terms of another variable substitution?
  4. How would the solution change if the function was non-homogeneous?
  5. What is the importance of the constant CC in the general solution?

Tip: Always remember to apply the initial condition carefully to find the correct value of CC when solving an IVP.

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Math Problem Analysis

Mathematical Concepts

Differential Equations
Integration

Formulas

General Solution of DE: y = ∫ (7x^13 + 10 - 5e^x) dx
∫7x^13 dx = x^14 / 2
∫10 dx = 10x
∫-5e^x dx = -5e^x

Theorems

Fundamental Theorem of Calculus

Suitable Grade Level

Undergraduate Calculus