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Lady bird [3.3K]
3 years ago
5

Please help with at least one of these( I accept 1 answer if you have it; make sure you are 100% positive its correct though!)

Mathematics
1 answer:
Tema [17]3 years ago
7 0

You do not have a attachment on this question.

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Which equation represents a proportional relationship? Oy=2(x + 1) Oy=2 o y = 4x + 3 o y = 32x y​
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Answer:

y=32x shows a proportional relationship.

Step-by-step explanation:

We need to find an equation that shows the proportional relationship.

If x and y are proportional to each other, it will look like,

y = mx

Where

m is constant of proportionality

Out of 4 option, option (4) is y=32x, it shows the proportional relationship where the value of m is equal to 32.

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frozen [14]

A) State the chain rule for integration

Ans. The chain rule for integration is also known as "  Integration by substitution "

Integration by substitution is taken in order to make integration solve easily in few steps.

For, I = \int\limits (x+2)^{2} \,dx

Instead of expanding term (x+2)^{2}

With substitution of  u = (x+2) and du= 1 dx

We simplified the integration as

I = \int\limits (u)^{2} \, du

I = \frac{(u)^{3}}{3}+C

By replacaing value of u=x+2

I = \frac{(x+2)^{3}}{3}+C

B) State the rule of differentiation for the sine function.

Ans. We know that \frac{d}{dx}Sinx dx = Cosx

C) Find the indefinite integral using substitution.

Ans.

Given, I = \int\limits {\frac{Cos14x}{Sin14x} } \, dx

Take y = Sin14x

Differentiating both side

dy=14Cos14x dx

\frac{dy}{14} = Cos14x\, dx

Substituting values in integration,

I = \int\limits {\frac{Cos14x}{Sin14x} } \, dx

I = \int\limits {\frac{1}{y} } \,\frac{dy}{14}

I = \frac{1}{14}\int\limits {\frac{1}{y} } \,dy

I = \frac{1}{14} lny + C

Replacing values in the integration

I = \frac{1}{14} ln(14Sin14x) + C

D)Check your work by taking a derivative of your answer from part C.

Ans.

Answer for Part C is I = \frac{1}{14} ln(14Sin14x) + C

Differentiating the answer

we get,

=\frac{1}{14}\frac{d}{dx}[ ln(Sin14x) + C]\\=\frac{1}{14}\frac{1}{Sin14x} \frac{d}{dx}(Sin14x)+ \frac{d}{dx}C\\=\frac{1}{14}\frac{1}{Cos14x}(14Cos14x)\\=\frac{Cos14x}{Sin14x} \\ =I

6 0
3 years ago
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