Assignment - Calculus 1 | Trường Đại học Quốc tế, Đại học Quốc gia Thành phố HCM

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Môn: Calculus 1 (MA001IU)

Trường: Trường Đại học Quốc tế, Đại học Quốc gia Thành phố Hồ Chí Minh

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Assignment I - CALCULUS I
Dr. Duong Thanh PHAM
Deadline: 8PM, October 15th 2021
Exercise 1.
Let A(1 (4, 2) and B , 3) be two points in R
2
. Find
(i)
−−→
AB
(ii) Parametric and symmetric equations of the line passing through A and .B
Exercise 2. Find a formula for the inverse of the function
f
(x) = x
2
+ 2x, x .≥ −1
Exercise 3.
Let f (x) =
p
2017 −sin(x + 1)
(i) Find the domain and the range of .f
(ii) Find functions g, h so that f(x) = g(h( (x)), x ∈ −∞ ∞, ).
Exercise 4. Let C be a circle with radius 2 centred at the point (2, 0).
(i) Write an equation for the circle .C
(ii) Is curve C the graph of a function of x? Explain your answer.
(iii) Write parametric equations to traverse C once, in a clockwise direction, starting from the origin.
Exercise 5. (i) Evaluate the limit
lim
x→2
√
6 −x −2
√
3 −x −1
.
(ii) By using the Squeeze Theorem, or otherwise, evaluate the limit
lim
x→π
(
x −π) sin
π
x
− π
.
Exercise 6. Use Squeeze theorem to evaluate the limit
lim
x
→0
x cos(ln | |x ).
Exercise 7. Which of the following is true for the function f(x) given by
f
(x) =
2x −1 if 1x < −
x
2
+ 1 if − 1 ≤ x ≤ 1
x + 1 if x > .1
(i) f is continuous everywhere,
(ii) f is continuous everywhere except at x = −1 and x = 1,
(iii) f is continuous everywhere except at 1,x = −
(iv) f is continuous everywhere except at x = 1,
(v) None of the above.
Explain your choice in details.
1
Exercise 8. Let
g
(x) =
cos x if 0x <
0 if x = 0
1
− x
2
if x > 0.
(i) Explain why g(x) is discontinuous at x = 0.
(ii) Sketch the graph of g(x).
Exercise 9. The radius of the earth is roughly 4000 miles, and an object located x miles from the
center of the earth weighs w(x) lb, where
w
(x) =
ax if 0 < x ≤ 4000
b
x
2
if x > 4000
and a and b are positive constants.
(i) Show that w(x) is continuous on (0; ∞) if and only if
a
=
b
4000
3
(ii) Find any horizontal asymptotes and sketch the graph of w(x).
Exercise 10. Show that the equation
x
3
− x sin x − 1 = x
√
x + 2
has a real root in the interval [0, 2].
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Assignment I - CALCULUS I Dr. Duong Thanh PHAM
Deadline: 8PM, October 15th 2021
Exercise 1. Let A(1, 2) and B(4, 3) be two points in R2. Find −−→ (i) AB
(ii) Parametric and symmetric equations of the line passing through A and B.
Exercise 2. Find a formula for the inverse of the function f (x) = x2 + 2x, x ≥ −1.
Exercise 3. Let f (x) = p2017 − sin(x + 1)
(i) Find the domain and the range of f .
(ii) Find functions g, h so that f (x) = g(h(x)), x ∈ (−∞, ∞).
Exercise 4. Let C be a circle with radius 2 centred at the point (2, 0).
(i) Write an equation for the circle C.
(ii) Is curve C the graph of a function of x? Explain your answer.
(iii) Write parametric equations to traverse C once, in a clockwise direction, starting from the origin. Exercise 5. (i) Evaluate the limit √6 − x − 2 lim √ . x→2 3 − x − 1
(ii) By using the Squeeze Theorem, or otherwise, evaluate the limit π lim (x − π) sin . x→π x − π
Exercise 6. Use Squeeze theorem to evaluate the limit lim x cos(ln |x|). x→0
Exercise 7. Which of the following is true for the function f (x) given by  2x − 1 if x < −1   f (x) = x2 + 1 if − 1 ≤ x ≤ 1  x + 1 if x > 1.
(i) f is continuous everywhere,
(ii) f is continuous everywhere except at x = −1 and x = 1,
(iii) f is continuous everywhere except at x = −1,
(iv) f is continuous everywhere except at x = 1, (v) None of the above.
Explain your choice in details. 1 Exercise 8. Let cos x if x < 0   g(x) = 0 if x = 0  1 − x2 if x > 0.
(i) Explain why g(x) is discontinuous at x = 0. (ii) Sketch the graph of g(x).
Exercise 9. The radius of the earth is roughly 4000 miles, and an object located x miles from the
center of the earth weighs w(x) lb, where ax if 0 < x  ≤ 4000 w(x) = b  if x > 4000 x2
and a and b are positive constants.
(i) Show that w(x) is continuous on (0; ∞) if and only if b a = 40003
(ii) Find any horizontal asymptotes and sketch the graph of w(x).
Exercise 10. Show that the equation √ x3 − x sin x − 1 = x x + 2
has a real root in the interval [0, 2]. 2