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Lesechka [4]
3 years ago
8

Evaluate the expression 6(3)^-3

Mathematics
1 answer:
madam [21]3 years ago
5 0

Answer:

165

Step-by-step explanation:

6(3)^-3

= 6 (27) - 3

= 168-3

=165

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Giải phương trình vi phân<br> a. dy/dx<br> b. y' + 2xy = 4x
WITCHER [35]

Your first differential equation is incomplete, so I'll just look at the second one.

<em>y'</em> + 2<em>xy</em> = 4<em>x</em>

Multiply both sides by exp(<em>x</em> ²):

exp(<em>x</em> ²) <em>y'</em> + 2<em>x</em> exp(<em>x</em> ²) <em>y</em> = 4<em>x</em> exp(<em>x</em> ²)

The left side is the derivative of a product:

(exp(<em>x</em> ²) <em>y</em> )<em>'</em> = 4<em>x</em> exp(<em>x</em> ²)

Integrate both sides:

exp(<em>x</em> ²) <em>y</em> = ∫ 4<em>x</em> exp(<em>x</em> ²) d<em>x</em>

For the integral, substitute <em>u</em> = <em>x</em> ² and d<em>u</em> = 2<em>x</em> d<em>x</em> :

exp(<em>x</em> ²) <em>y</em> = 2 ∫ exp(<em>u</em>) d<em>u</em>

Solve for <em>y</em> :

exp(<em>x</em> ²) <em>y</em> = 2 exp(<em>u</em>) + <em>C</em>

exp(<em>x</em> ²) <em>y</em> = 2 exp(<em>x</em> ²) + <em>C</em>

<em>y</em> = 2 + <em>C</em> exp(-<em>x</em> ²)

8 0
3 years ago
Solve the given trigonometric equation analytically and by use of a calculator. Compare results. Use values of x for 0≤x≤2π
kodGreya [7K]

Answer:

it can help you with answer a math problem

Step-by-step explanation:

8 0
3 years ago
Five gallons of water need to be shared equally among 6 people. How many gallons of water will each person get?
Kipish [7]

Answer:

5/6

Step-by-step explanation:

To distribute the water equally, you divide the 5 gallons of H2O by 6 people. You will get the fraction 5/6 as your answer.

6 0
4 years ago
6x + 5y = 7 and 2x + 3y = 3
ra1l [238]
6x + 5y = 7
-6x - 9y = -9

-4y = -2

y = 1/2 or 0.5

2x + 3(1/2) = 3
2x + 1.5 = 3
2x = 1.5

x = 0.75
4 0
4 years ago
The angle created by ray OX and ray OZ is angle . The two rays that create YOX are ray OX and ray . The center of the circle is
son4ous [18]

The answers

1. XOZ

2. OY

3. O

5 0
3 years ago
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