All flashcards
Flashcard 1: What equation results from integrating ydy=x1dx?
Answer: ln∣y∣=ln∣x∣+C. Standard result from integrating separated variables.
Flashcard 2: Convert dxdy=x2y3 into a separable form.
Answer: y3dy=x2dx. Move y3 to the left side and x2 to the right.
Flashcard 3: Find the particular solution of dxdy=2x with y(0)=4.
Answer: y=x2+4. Integrate to get y=x2+C, then use initial condition.
Flashcard 4: What is the particular solution for dxdy=−3y with y(2)=1?
Answer: y=e−3x+6. From y=Ce−3x, use y(2)=1 to find C=e6.
Flashcard 5: What is the role of the integration constant C in differential equations?
Answer: Represents the family of solutions. Each value of C gives a different particular solution.
Flashcard 6: What is the general solution of dxdy=1?
Answer: y=x+C. Direct integration of a constant function.
Flashcard 7: Determine C for the particular solution of dxdy=5y with y(0)=7.
Answer: C=7. From y=Ce5x with y(0)=7, so C=7.
Flashcard 8: Solve dxdy=x3y2 by separating variables.
Answer: y2dy=x3dx. Move y2 to left side and x3 to right side.
Flashcard 9: Given dxdy=3x2, what is the particular solution with y(0)=2?
Answer: y=x3+2. Integrate to get y=x3+C, then use y(0)=2 to find C=2.
Flashcard 10: State the integration result of ydy=x1dx.
Answer: ln∣y∣=ln∣x∣+C. Direct integration of the separated variables.
Flashcard 11: What is the general solution for dxdy=−y?
Answer: y=Ce−x. Standard exponential decay with rate 1.
Flashcard 12: What is the role of C in the solution y=Cekx?
Answer: Constant for initial conditions. Determines the specific solution from the family of solutions.
Flashcard 13: Given dxdy=4x, find C if y(1)=6.
Answer: C=4. From y=2x2+C with y(1)=6, so C=4.
Flashcard 14: Solve dxdy=xy for y using separation of variables.
Answer: y=Cx. Separate to ydy=xdx and integrate both sides.
Flashcard 15: What is the particular solution for dxdy=2y with y(0)=3?
Answer: y=3e2x. From y=Ce2x with condition y(0)=3 giving C=3.
Flashcard 16: Determine the particular solution of dxdy=y with y(0)=5.
Answer: y=5ex. From general solution y=Cex, use condition to find C=5.
Flashcard 17: What is the general solution to dxdy=−ky?
Answer: y=Ce−kx. Standard exponential decay solution with rate k.
Flashcard 18: What is the general solution for dxdy=x2?
Answer: y=3x3+C. Direct integration of the polynomial function.
Flashcard 19: Find the particular solution for dxdy=3x2 with y(0)=1.
Answer: y=x3+1. Integrate 3x2 and apply the initial condition at x=0.
Flashcard 20: What is the solution to dxdy=0?
Answer: y=C. When the derivative is zero, the function is constant.
Flashcard 21: Solve dxdy=−2xy for y using separation of variables.
Answer: y=Ce−x2. Separate to ydy=−2xdx and integrate both sides.
Flashcard 22: Given y=Cex2, find C if y(0)=1.
Answer: C=1. Substitute x=0 and y=1 into the general solution.
Flashcard 23: Find the particular solution to dxdy=x2y with y(1)=3.
Answer: y=3x2. Separate to ydy=x2dx, integrate to get y=Cx2.
Flashcard 24: Solve for y given dxdy=x with initial condition y(1)=3.
Answer: y=2x2+25. Integrate ∫xdx=2x2+C and apply condition.
Flashcard 25: What is the purpose of using initial conditions in solving differential equations?
Answer: To find particular solutions. They eliminate the arbitrary constant C from general solutions.
Flashcard 26: Given dxdy=2y, find the particular solution with y(0)=1.
Answer: y=e2x. From y=Ce2x with initial condition y(0)=1.
Flashcard 27: What is the general solution to dxdy=ky using separation of variables?
Answer: y=Cekx. Standard form for exponential growth/decay differential equations.
Flashcard 28: How do you integrate y′=dxdy=x2y using separation of variables?
Answer: ydy=x2dx. Divide both sides by y and multiply by dx.
Flashcard 29: What is the first step in solving a differential equation using separation of variables?
Answer: Separate the variables. This allows variables to be on different sides for integration.
Flashcard 30: What is the solution to dxdy=4y using separation of variables?
Answer: y=Ce4x. Standard exponential solution with growth rate k=4.