All flashcards
Flashcard 1: What does a negative value for Integral(a,b)f(x)dx indicate?
Answer: Net area below the x-axis. Function values below x-axis contribute negatively to area.
Flashcard 2: Identify the integral expression for a constant k over [a,b].
Answer: k(b−a). Constant function creates rectangular area.
Flashcard 3: What does f(x)>0 on [a,b] imply for integral?
Answer: Positive area. Positive function ensures positive contribution to integral.
Flashcard 4: What does a positive value for Integral(a,b)f(x)dx indicate?
Answer: Net area above the x-axis. Function values above x-axis contribute positively to area.
Flashcard 5: Find the accumulation function F(x)=Integral(a,x)f(t)dt. What is F′(x)?
Answer: F′(x)=f(x). Fundamental Theorem: derivative of accumulation function is integrand.
Flashcard 6: What is the integral of f(x) over [a,b] for f(x)=0?
Answer:
- Zero function contributes no area over any interval.
Flashcard 7: What is the effect of reversing the limits of integration?
Answer: Changes the sign of the integral. Swapping integration bounds negates the integral value.
Flashcard 8: Evaluate Integral(a,a)f(x)dx.
Answer:
- No interval means no area to accumulate.
Flashcard 9: Evaluate Integral(a,b)0dx.
Answer:
- Zero function contributes no area over any interval.
Flashcard 10: What is the integral of f(x) if f(x) is constant?
Answer: k(b−a). Constant function creates rectangular area over given interval.
Flashcard 11: What does Integral(a,b)f(x)dx represent geometrically?
Answer: Net signed area between f(x) and x-axis. Signed area accounts for regions above and below x-axis.
Flashcard 12: Evaluate the definite integral of a constant k over [a,b].
Answer: k(b−a). Constant function creates rectangular area over given interval.
Flashcard 13: What is the effect of scaling f(x) by k on area?
Answer: Area scales by k. Scalar multiplication affects integral proportionally.
Flashcard 14: What is the integral of c from a to b, where c is constant?
Answer: c(b−a). Constant function creates rectangular area over interval.
Flashcard 15: What is the meaning of Integral(a,b)f(x)dx=0?
Answer: Equal positive and negative area. Zero integral means positive and negative areas cancel exactly.
Flashcard 16: Evaluate Integral(a,b)[f(x)+g(x)]dx.
Answer: Integral(a,b)f(x)dx+Integral(a,b)g(x)dx. Linearity property allows splitting sum of functions.
Flashcard 17: What does Integral(a,b)f′(x)dx represent?
Answer: f(b)−f(a). Net change theorem: integral of derivative gives function change.
Flashcard 18: What does f(x)<0 on [a,b] imply for integral?
Answer: Negative area. Negative function ensures negative contribution to integral.
Flashcard 19: State the property: Integral(a,b)f(x)dx+Integral(b,c)f(x)dx.
Answer: Integral(a,c)f(x)dx. Integral property allows splitting at any intermediate point.
Flashcard 20: Find Integral(a,b)cf(x)dx, where c is constant.
Answer: c×Integral(a,b)f(x)dx. Constant factor can be pulled outside the integral.
Flashcard 21: What does ∫ab∣f(x)∣dx represent?
Answer: Total area ignoring sign. Absolute value ensures all contributions are positive.
Flashcard 22: What does the area between f(x) and g(x) represent?
Answer: ∫ab[f(x)−g(x)]dx. Difference of functions gives area between their curves.
Flashcard 23: What does the average value of f(x) over [a,b] mean?
Answer: b−a1×∫abf(x)dx. Average value formula divides total area by interval length.
Flashcard 24: State the property: Integral(a,b)f(x)dx+Integral(b,c)f(x)dx.
Answer: Integral(a,c)f(x)dx. Integral property allows splitting at any intermediate point.
Flashcard 25: What does the area between f(x) and g(x) represent?
Answer: Integral(a,b)[f(x)−g(x)]dx. Difference of functions gives area between their curves.
Flashcard 26: What does f(x)<0 on [a,b] imply for integral?
Answer: Negative area. Negative function ensures negative contribution to integral.
Flashcard 27: Evaluate Integral(a,b)[f(x)+g(x)]dx.
Answer: Integral(a,b)f(x)dx+Integral(a,b)g(x)dx. Linearity property allows splitting sum of functions.
Flashcard 28: What does ∫abf′(x)dx represent?
Answer: f(b)−f(a). Net change theorem: integral of derivative gives function change.
Flashcard 29: What is the meaning of Integral(a,b)f(x)dx=0?
Answer: Equal positive and negative area. Zero integral means positive and negative areas cancel exactly.
Flashcard 30: What is the integral of c from a to b, where c is constant?
Answer: c(b−a). Constant function creates rectangular area over interval.