ECAT Mathematics
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ECAT Mathematics

Chapter 17: Integration

80 Questions 90 Minutes Pass: 60%+ ECAT Prep
0 ∫x^n dx (n≠−1) =
1 ∫1 dx =
2 ∫e^x dx =
3 ∫sinx dx =
4 ∫cosx dx =
5 ∫sec²x dx =
6 ∫1/x dx =
7 ∫a^x dx =
8 ∫cscx cotx dx =
9 ∫secx tanx dx =
10 The definite integral ∫₀¹ x dx =
11 ∫₀^π sinx dx =
12 Integration by substitution: ∫f(g(x))g'(x)dx. Let u=g(x), then:
13 ∫2x(x²+1)^3 dx using u=x²+1:
14 ∫sin²x dx = ∫(1−cos2x)/2 dx =
15 ∫cos²x dx =
16 Fundamental Theorem of Calculus (Part 1): d/dx[∫_{a}^{x}f(t)dt] =
17 Fundamental Theorem (Part 2): ∫_{a}^{b}f(x)dx =
18 Integration by parts: ∫u dv =
19 ∫x e^x dx (u=x, dv=e^x dx):
20 ∫lnx dx (u=lnx, dv=dx):
21 Area between curve y=f(x) and x-axis from a to b:
22 Area between y=x² and y=x: intersection at x=0 and x=1. Area=
23 ∫tan x dx =
24 ∫cot x dx =
25 ∫sec x dx =
26 ∫dx/(1+x²) =
27 ∫dx/√(1−x²) =
28 ∫₁² 1/x dx =
29 ∫(2x+3)^4 dx (u=2x+3):
30 ∫₀^{π/2} cosx dx =
31 ∫₀^{π/2} sin x dx =
32 The constant of integration C represents:
33 ∫(x²+3x−1)dx =
34 ∫_{-1}^{1} x³ dx =
35 ∫_{-1}^{1} x² dx =
36 Volume of solid of revolution about x-axis: V = π∫_a^b [f(x)]² dx. This is called:
37 ∫e^{2x} dx =
38 ∫sin(3x) dx =
39 ∫cos(2x) dx =
40 ∫x cosx dx (by parts: u=x, dv=cosxdx):
41 ∫x² lnx dx (u=lnx, dv=x²dx):
42 The average value of f(x) on [a,b]:
43 ∫₀¹ x² dx =
44 ∫₀^{π} x sinx dx (by parts):
45 ∫dx/x² = ∫x^{-2} dx =
46 ∫(sinx/cosx) dx = ∫tanx dx =
47 Trapezoidal rule for area: A≈(h/2)[f(x₀)+2f(x₁)+2f(x₂)+...+f(xₙ)] is a:
48 Simpson's rule requires the number of subintervals to be:
49 ∫x/(x²+1) dx =
50 ∫sin²x cos x dx (u=sinx):
51 The improper integral ∫₁^∞ 1/x dx =
52 The improper integral ∫₁^∞ 1/x² dx =
53 ∫₀² 3x² dx =
54 ∫₀^{π/4} sec²x dx =
55 If F'(x)=f(x), then ∫f(x)dx =
56 ∫(3/x + 4x + 5) dx =
57 ∫₀^1 (1+x)^2 dx =
58 ∫1/(a²+x²) dx =
59 ∫1/√(a²−x²) dx =
60 Area under y=sinx from 0 to π:
61 Area bounded by y=x² and y=4 (from −2 to 2):
62 ∫sin(x+π/4)dx =
63 Property: ∫_a^a f(x)dx =
64 Property: ∫_a^b f(x)dx = −∫_b^a f(x)dx:
65 ∫₋₂² x³ dx using odd function property:
66 ∫tan²x dx = ∫(sec²x−1)dx =
67 ∫csc²x dx =
68 ∫_{−π}^{π} sinx dx =
69 ∫_{0}^{π/2} sin²x dx = π/4 (verify: ∫(1-cos2x)/2 dx from 0 to π/2):
70 ∫e^{-x} dx =
71 ∫₀^∞ e^{-x} dx (improper):
72 ∫(x+1)e^x dx (by parts or notice (xe^x)'=e^x+xe^x):
73 ∫√x dx =
74 ∫₁^4 √x dx =
75 ∫(x²+x+1)/x dx = ∫(x+1+1/x)dx =
76 ∫₀^1 x/(1+x²) dx =
77 ∫sin x cos x dx = ∫sin(2x)/2 dx =
78 ∫₀^{π/2} cos(2x)dx =
79 Integration of f(ax+b): ∫f(ax+b)dx = F(ax+b)/a+C. For ∫sin(2x+1)dx:
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