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zloy xaker [14]
2 years ago
15

Find n.

Mathematics
1 answer:
KonstantinChe [14]2 years ago
3 0

Answer: I know you don’t want me to answer the math questions but I did, look at the picture and I can't get on padIet

Step-by-step explanation: Hope this help :D

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"Find the point of intersection for each system of linear equations. Which method did you use & why?"
lisabon 2012 [21]
Set each equation to get Y by its self
Then set the equations equal to each other and solve for X
Easy(:
8 0
3 years ago
Consider the differential equation 4y'' â 4y' + y = 0; ex/2, xex/2. Verify that the functions ex/2 and xex/2 form a fundamental
Kazeer [188]

Check the Wronskian determinant:

W(e^{x/2},xe^{x/2})=\begin{vmatrix}e^{x/2}&xe^{x/2}\\\frac12e^{x/2}&\left(1+\frac x2\right)e^{x/2}\end{vmatrix}=\left(1+\frac x2\right)e^x-\frac x2e^x=e^x\neq0

The determinant is not zero, so the solutions are indeed linearly independent.

7 0
3 years ago
If the length of a side of an<br> equilateral triangle is x, what is half of the perimeter?
nataly862011 [7]

Answer:

3/2 x

Step-by-step explanation:

length of a side of an  equilateral triangle is x

The perimeter is

P = 3s  where s is the side length

P = 3x

1/2 of the perimeter

1/2 (3x)

3/2 x

4 0
3 years ago
In a G.P the 3rd term is 4 times the 1st term and the sum of the 2nd term and the 4th term is 30.find the common ratio,find the
STALIN [3.7K]

Answer:

the common ratio is either 2 or -2.

the sum of the first 7 terms is then either 765 or 255

Step-by-step explanation:

a geometric sequence or series of progression (these are the most common names for the same thing) means that every new term of the sequence is created by multiplying the previous term by a constant factor which is called the common ratio.

so,

a1

a2 = a1×f

a3 = a2×f = a1×f²

a4 = a3×f = a1×f³

the problem description here tells us

a3 = 4×a1

and from above we know a3 = a1×f².

so, f² = 4

and therefore the common ratio = f = 2 or -2 (we need to keep that in mind).

again, the problem description tells us

a2 + a4 = 30

a1×f + a1×f³ = 30

for f = 2

a1×2 + a1×2³ = 30

2a1 + 8a1 = 30

10a1 = 30

a1 = 3

for f = -2

a1×-2 + a1×(-2)³ = 30

-10a1 = 30

a1 = -3

the sum of the first n terms of a geometric sequence is

sn = a1×(1 - f^(n+1))/(1-f) for f <>1

so, for f = 2

s7 = 3×(1 - 2⁸)/(1-2) = 3×-255/-1 = 3×255 = 765

for f = -2

s7 = -3×(1 - (-2)⁸)/(1 - -2) = -3×(1-256)/3 = -3×-255/3 =

= -1×-255 = 255

4 0
2 years ago
Using the quadratic formula, what are the solutions to x2 – 3x = -2?
Kryger [21]

Step-by-step explanation:

<h2>Nubra Valley in Ladakh. Nubra Valley | #1 of 30 Most Beautiful Places in India. ... </h2><h2>Khajjiar in Himachal Pradesh. ... </h2><h2>Valley of Flowers in Uttarakhand. ... </h2><h2>Dal Lake in Srinagar. ... </h2><h2>Munnar in Kerala. ... </h2><h2>Dudhsagar Falls in Goa. ... </h2><h2>Yumthang Valley in Sikkim. ... </h2><h2>Tawang in Arunachal Pradesh.</h2>
6 0
1 year ago
Read 2 more answers
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