Homework Answers
1. Let A be a nonempty subset of R such that every number in A is...
1. Let A be a nonempty subset of R such that every number in A
is greater than 2 (NOTE: This doesn’t necessarily mean that A =
(2,∞)).
(a) Explain why A must have an infimum.
(b) Let c = inf(A). Prove that a∈A INTERSECTION (−∞,a] =
(−∞,c].
CAN SOMEONE PLZ HELP ME WITH THIS QUESTION.
1. Let A be a nonempty subset of R such that every number in A is greater than 2 (NOTE: This doesn't necessarily mean...
3. (12 pt) Suppose that S is the subset of R2 that contains all vectors on...
3. (12 pt) Suppose that S is the subset of R2 that contains all vectors on the two lines y = x and y = -2 s={[x] € R: y=x or y = -x} ER2: y = r or y=- (a) In each of the following parts (i)-(iii), either show the statements is true or give a counterexample to show that the statement is false. Clearly state TRUE or FALSE. Graphs of y = x and y = -1 may...
1 Let f: R R be a continuously differentiable map satisfying ilf(x)-FG) ll 리1x-vil, f Rn. Then fis onto 2. f(RT) is a closed subset of R'" 3, f(R") is an open subset of RT 4. f(0)...
1 Let f: R R be a continuously differentiable map satisfying ilf(x)-FG) ll 리1x-vil, f Rn. Then fis onto 2. f(RT) is a closed subset of R'" 3, f(R") is an open subset of RT 4. f(0)0 or all x, y E 5) S= (xe(-1,4] Sin(x) > 0). Let of the following is true? I. inf (S).< 0 2. sup (S) does not exist Which . sup (S) π ,' inf (S) = π/2
1 Let f: R R be...
(a) Evaluate the double integral 4. (sin cos y) dy dr. Hint: You may need the formula for integration by parts (b) Show...
(a) Evaluate the double integral 4. (sin cos y) dy dr. Hint: You may need the formula for integration by parts (b) Show that 4r+6ry>0 for all (r,y) ER-(x,y): 1S2,-2Sysi) Use a double integral to compute the volume of the solid that lies under the graph of the function 4+6ry and above the rectangle R in the ry-plane. e) Consider the integral tan(r) log a dyd. (i) Make a neat, labelled sketch of the region R in the ry-plane over...
Show all of your work. Label the axes and scale on your graph. The sketch should...
Show all of your work. Label the axes and scale on your graph. The sketch should include at least three . to five points including the points of intersection and at least one point in between The integration techniques used should be clear and easy to follow step by step with all techniques shown in detail, including the substitution method. . . All steps must be shown in your own writing to receive any credit. Circle or box your final...
2. Consider the surface -v 9-2r2-r : f(x, y) z (a) What is the domain and range of f? (b) Sketch the level curves f...
2. Consider the surface -v 9-2r2-r : f(x, y) z (a) What is the domain and range of f? (b) Sketch the level curves for 2-f(r,y) -0,-3,-2V2,-v5 (c) Sketch the cross sections of the surface in the r-2 plane and in the y-z plane (d) Find any z, y and z intercepts Use the above information to identify and sketch the surface.
2. Consider the surface -v 9-2r2-r : f(x, y) z (a) What is the domain and range of...
3. Consider the system of differential equations = z+9-1 (a) Sketch the r-nullcline, where soluti...
just (A) (B) (C)
3. Consider the system of differential equations = z+9-1 (a) Sketch the r-nullcline, where solutions must travel vertically. Identify the regions (b) On a separate set of axes, sketch the y-nullcline, where solutions must travel horizon in the plane where solutions will move toward the right, and where solutions move toward the right tally. Identify the regions in the plane where solutions will move upward, and where solutions move downward. (c) On a third set of...
The Moulton Plane is the plane M = (R2, LM) such that a subset I of...
The Moulton Plane is the plane M = (R2, LM) such that a subset I of R2 belongs to LM if and only if one of the following holds: i) l = {(x,y)| x=a} (vertical line); ii) l = {(x,y)| y=b} (horizontal line) iii) ( = {(x,y)| y = mx +b where m<0} (line with negative slope) [ m(x - x0) if x xo when m>0}. (bent line W 14,9 m ( x - x0) if x > xo with...
Let A be a subset of R. If x € R we say x is a...
Let A be a subset of R. If x € R we say x is a boundary point of A if for all € > 0, (0 – €,x +E) NA # and (x - €, x+) NĀ+). The boundary of A is a A. It is the set of all boundary points of A. The interior of A is int A = A (BA). The closure of A is cl A = AU (DA). Let B be a subset...
1. Let A be a nonempty subset of R such that every number in A
is greater than 2 (NOTE: This doesn’t necessarily mean that A =
(2,∞)).
(a) Explain why A must have an infimum.
(b) Let c = inf(A). Prove that a∈A INTERSECTION (−∞,a] =
(−∞,c].
CAN SOMEONE PLZ HELP ME WITH THIS QUESTION.
1. Let A be a nonempty subset of R such that every number in A is greater than 2 (NOTE: This doesn't necessarily mean...
3. (12 pt) Suppose that S is the subset of R2 that contains all vectors on the two lines y = x and y = -2 s={[x] € R: y=x or y = -x} ER2: y = r or y=- (a) In each of the following parts (i)-(iii), either show the statements is true or give a counterexample to show that the statement is false. Clearly state TRUE or FALSE. Graphs of y = x and y = -1 may...
1 Let f: R R be a continuously differentiable map satisfying ilf(x)-FG) ll 리1x-vil, f Rn. Then fis onto 2. f(RT) is a closed subset of R'" 3, f(R") is an open subset of RT 4. f(0)0 or all x, y E 5) S= (xe(-1,4] Sin(x) > 0). Let of the following is true? I. inf (S).< 0 2. sup (S) does not exist Which . sup (S) π ,' inf (S) = π/2
1 Let f: R R be...
(a) Evaluate the double integral 4. (sin cos y) dy dr. Hint: You may need the formula for integration by parts (b) Show that 4r+6ry>0 for all (r,y) ER-(x,y): 1S2,-2Sysi) Use a double integral to compute the volume of the solid that lies under the graph of the function 4+6ry and above the rectangle R in the ry-plane. e) Consider the integral tan(r) log a dyd. (i) Make a neat, labelled sketch of the region R in the ry-plane over...
Show all of your work. Label the axes and scale on your graph. The sketch should include at least three . to five points including the points of intersection and at least one point in between The integration techniques used should be clear and easy to follow step by step with all techniques shown in detail, including the substitution method. . . All steps must be shown in your own writing to receive any credit. Circle or box your final...
2. Consider the surface -v 9-2r2-r : f(x, y) z (a) What is the domain and range of f? (b) Sketch the level curves for 2-f(r,y) -0,-3,-2V2,-v5 (c) Sketch the cross sections of the surface in the r-2 plane and in the y-z plane (d) Find any z, y and z intercepts Use the above information to identify and sketch the surface.
2. Consider the surface -v 9-2r2-r : f(x, y) z (a) What is the domain and range of...
just (A) (B) (C)
3. Consider the system of differential equations = z+9-1 (a) Sketch the r-nullcline, where solutions must travel vertically. Identify the regions (b) On a separate set of axes, sketch the y-nullcline, where solutions must travel horizon in the plane where solutions will move toward the right, and where solutions move toward the right tally. Identify the regions in the plane where solutions will move upward, and where solutions move downward. (c) On a third set of...
The Moulton Plane is the plane M = (R2, LM) such that a subset I of R2 belongs to LM if and only if one of the following holds: i) l = {(x,y)| x=a} (vertical line); ii) l = {(x,y)| y=b} (horizontal line) iii) ( = {(x,y)| y = mx +b where m<0} (line with negative slope) [ m(x - x0) if x xo when m>0}. (bent line W 14,9 m ( x - x0) if x > xo with...
Let A be a subset of R. If x € R we say x is a boundary point of A if for all € > 0, (0 – €,x +E) NA # and (x - €, x+) NĀ+). The boundary of A is a A. It is the set of all boundary points of A. The interior of A is int A = A (BA). The closure of A is cl A = AU (DA). Let B be a subset...
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