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Elodia [21]
3 years ago
8

Pa help po dito please need Napo kase ehhh​

Mathematics
1 answer:
dedylja [7]3 years ago
7 0
(1) 4/5
(2) 7/9
(3) 6/10
(4) 8/8 or 1 whole
(5) 8/9
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Set up but do not solve for the appropriate particular solution yp for the differential equation y′′+4y=5xcos(2x) using the Meth
taurus [48]

Answer:

So, solution of  the differential equation is

y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos  2x+c_1e^{-2it}+c_2e^{2it}\\

Step-by-step explanation:

We have the given differential equation: y′′+4y=5xcos(2x)

We use the Method of Undetermined Coefficients.

We first solve the homogeneous differential equation y′′+4y=0.

y''+4y=0\\\\r^2+4=0\\\\r=\pm2i\\\\

It is a homogeneous solution:

y_h(t)=c_1e^{-2i t}+c_2e^{2i t}

Now, we finding a particular solution.

y_p(t)=A5x\cos 2x\\\\y'_p(t)=A5\cos 2x-A10x\sin 2x\\\\y''_p(t)=-A20\sin 2x-A20x\cos 2x\\\\\\\implies y''+4y=5x\cos 2x\\\\-A20\sin 2x-A20x\cos 2x+4\cdot A5x\cos 2x=5x\cos 2x\\\\-A20\sin 2x=5x\cos 2x\\\\A=-\frac{x}{4} \cot 2x\\

we get

y_p(t)=A5\cos 2x\\\\y_p(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos  2x\\\\\\y(t)=y_p(t)+y_h(t)\\\\y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos  2x+c_1e^{-2it}+c_2e^{2it}\\

So, solution of  the differential equation is

y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos  2x+c_1e^{-2it}+c_2e^{2it}\\

7 0
3 years ago
WILL GIVE BRANLIEST
Nostrana [21]

The value of x of the factored expression when p = 4 and q = -4 is 1008

<h3>Factorisation</h3>

Factorisation is the breaking down of an entity or a mathematical expression.

Therefore,

x = p²q²q + pq - q³ - p³

it cannot be factored

x = p²q³ - q³ - p³ + pq

Therefore,

when p = 4 and q = -4

x = p²q³ - q³ - p³ + pq

x = (4)²(-4)³ - (-4)³ - (4)³ + 4(-4)

x = 16(-64) + 64 - 64 - 16

x = 1024 - 16

x = 1008

learn more on expression here: brainly.com/question/4470031

3 0
2 years ago
F (x)= 3x +4 , find f (2)
natima [27]

Answer:

10

Step-by-step explanation:

First substitute x for 2

3(2) + 4

6+4

10  When x is 2 f = 10

5 0
3 years ago
Antony buys one pound of oranges for $12 and sells it for $14. How can he write the profit in his account book?
Dima020 [189]
14. sorry if i’m wrong.
6 0
3 years ago
What is the 185th digit in the following pattern 12345678910111213141516….
kicyunya [14]

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185 = 447 digits in total

7 0
4 years ago
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