Question

Let Q1, Q2, Q3, Q4 be constants so that y =Q1+Q2x+Q3x^2+Q4x^3 satisfies that y(1)=1 and (1-x^2)y"-2xy'+12y=0.

Answer #1

Let Q1, Q2, Q3 be constants so that (Q1, Q2) is the critical
point of the function f(x, y) = xy + y − x, and Q3 = 1 if f has a
local minimum at (Q1, Q2), Q3 = 2 if f has a local maximum at (Q1,
Q2), Q3 = 3 if f has a saddle point at (Q1, Q2), and Q3 = 4
otherwise. Let Q = ln(3 + |Q1| + 2|Q2| + 3|Q3|). Then T =...

Let Q1, Q2, Q3 be constants so that (Q1, Q2) is the critical
point of the function f(x, y) = xy − 5x − 5y + 25, and Q3 = 1 if f
has a local minimum at (Q1, Q2), Q3 = 2 if f has a local maximum at
(Q1, Q2), Q3 = 3 if f has a saddle point at (Q1, Q2), and Q3 = 4
otherwise. Let Q = ln(3 + |Q1| + 2|Q2| + 3|Q3|). Then...

2. Let Q1 = y(2), Q2 = y(3), where y = y(x) solves y' + 2xy =
2x^3 , y(0) = 1. Let Q = ln(3 + |Q1| + 2|Q2|). Then T = 5 sin^2
(100Q) satisfies:— (A) 0 ≤ T < 1. — (B) 1 ≤ T < 2. — (C) 2 ≤
T < 3. — (D) 3 ≤ T < 4. — (E) 4 ≤ T ≤ 5.

Year
Quarter
Sales
1
Q1
7
Q2
2
Q3
4
Q4
10
2
Q1
6
Q2
3
Q3
8
Q4
14
3
Q1
10
Q2
3
Q3
5
Q4
16
4
Q1
12
Q2
4
Q3
7
Q4
22
1.Develop a model for trend and seasonality. Please clearly
define your variables. How many independent variables do you have
in your regression?
2.What is the intercept in your estimated regression model?
Rounded to two decimal places.
3.Use the model to forecast...

4 linear equation
Q1: y=5-0.8a
Q2: y=10-b
Q3=Q1+Q2
Q4:y=0.4c
If a+b=c, then which point does Q4 intersects with Q3?
The answer is (3.42,8.55) Want to know the step plz.

Let Q1 be a constant so that Q1 = L(−3, 2), where z = L(x, y) is
the equation of the tangent plane to the surface z = ln(5x − 7y) at
the point (x0, y0) = (2, 1). Let Q = ln(3 + |Q1|). Then T = 5 sin2
(100Q)
satisfies:— (A) 0 ≤ T < 1. — (B) 1 ≤ T < 2. — (C) 2 ≤ T
< 3. — (D) 3 ≤ T < 4. —...

2xy/x2+1−2x+(ln(x2+1)−2)y′=0 ODE method of
exactness
y(5)+12y(4)+104y(3)+408y′′+1156y′=0
constant coefficient
y′′−4y′−12y=xe4x Underdetermined Coeffecient

let Q1= y(2) and Q2= y(3) where y=y(x) solves...
(dy/dx) + (2/x)y
=5x^2
y(1)=2

Let Q1 be a constant so that Q1 = L(5, 17), where z = L(x, y) is
the equation of the tangent plane to the surface z = x 6 + (y − x)
4 at the point (x0, y0) = (3, 4). Let Q = ln(3 + |Q1|). Then T = 5
sin2 (100Q)
satisfies:— (A) 0 ≤ T < 1. — (B) 1 ≤ T < 2. — (C) 2 ≤ T
< 3. — (D) 3 ≤...

Let Q1 be a constant so that Q1 = L(20, 12), where z = L(x, y)
is the equation of the tangent plane to the surface z = ln(19x +
8y) at the point (x0, y0) = (7, 11). Let Q = ln(3 + |Q1|). Then T =
5 sin2 (100Q)
satisfies:— (A) 0 ≤ T < 1. — (B) 1 ≤ T < 2. — (C) 2 ≤ T
< 3. — (D) 3 ≤ T < 4. —...

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