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cluponka [151]
3 years ago
8

What do roots look like in a graph

Mathematics
1 answer:
amm18123 years ago
7 0
The roots on the graph is basically the x-intercepts So if you see points that are on the x-axis then those are the roots.

Ex
x=0, x=-2 x=3 etc. <span />
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Find the volume of the solid generated by revolving the region in the first quadrant bounded by the coordinate​ axes, the curve
Salsk061 [2.6K]

Answer:

\large \boxed{2\pi(15 - \ln16)}

Step-by-step explanation:

A 90° portion of your volume is shown below.

Let's use the shell method and decompose the solid of revolution into cylindrical shells.

The volume of each cylindrical shell is

dV = 2πrh dx

where  

r = ln16 - x

h = eˣ

So

dV = 2π(ln16 - x)eˣdx  

\begin{array}{rcl}V& =& 2\pi \int_{0}^{\ln16}(\ln16 - x)e^{x}dx\\\\&=&2\pi \int_{0}^{\ln16}(\ln 16)e^{x}dx -2\pi \int_{0}^{\ln16} xe^{x}dx\\\\&=& 2\pi \ln16 \int_{0}^{\ln16}e^{x}dx - 2\pi\int_{0}^{\ln16}xe^{x}dx\\\\\end{array}

Let's integrate the two terms separately.

\begin{array}{rcl}A &=& 2\pi \ln16 \int_{0}^{\ln16}e^{x}dx\\\\&=& 2\pi\ln16[e^{x}]_{0}^{\ln16}\\\\&=& 2\pi\ln16(16 - 1)\\&= &\mathbf{30\pi\ln1}\\\\B &=&2\pi\int_{0}^{\ln16}xe^{x}dx\\\end{array}

Use the integration by parts formula

\int u dv  = uv - \int v du

\begin{array}{rcl}uv - \int v du &=&\\B &=& 2\pi[xe^{x}]_{0}^{\ln16} - 2\pi \int_{0}^{\ln16} e^{x}dx\\\\&=&2\pi[xe^{x}]_{0}^{\ln16}-2\pi [e^{x}]_{0 }^{\ln16}\\\\&= &2\pi(16\ln16- 0) -2\pi(16 - 1)\\&=& \mathbf{32\pi \ln16 -30\pi}\\A - B &= &30\pi\ln16 - 32\pi \ln16 +30\pi\\&=& 30\pi - 2\pi \ln16\\&=&\mathbf{2\pi(15 - \ln16)}\end{array}\\\text{The volume of the solid is $\large \boxed{\mathbf{2\pi(15 - \ln16)}}$}

7 0
3 years ago
Which table shows a proportional relationship between x and y
Tomtit [17]

Answer:

The answer is B (1 , 3) , (2 , 6) , (4 , 12) , (5 , 15)

Step-by-step explanation:

∵ X : 1 , 2 , 4 , 5

∵ Y : 3 , 6 , 12 , 15

∵ 2/6 = 1/3

∵ 4/12 = 1/3

∵ 5/15 = 1/3

∴ 1/3 = 2/6= 4/12 = 5/15 = 1/3 ⇒ all are proportion

∴ Answer B is in proportional relationship

4 0
2 years ago
Greatest common factor of: 12,90
Yakvenalex [24]

6 because it is the highest and goes into 12 twice and 90 15 times
6 0
2 years ago
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Find the value of x.
AfilCa [17]

Answer:

54

Step-by-step explanation:

5 0
3 years ago
Which ordered pair is a solution to the system of linear equations below?<br> y= 1/4x+2<br> y= x-1
adelina 88 [10]

Answer:

The answer is (4,3)

Step-by-step explanation:

Use desmos graphing calculator, find the points where they meet. Search desmos on google and click on the first link.

8 0
2 years ago
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