Find the integral $\pi \int_{-6}^{k}\frac{y\left(y^2+12y+61\right)}{y^3+15y^2+76y+140}dy$

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Final answer to the problem

$\pi k+\frac{34.5575192}{2}\ln\left(\left(k+4\right)^2+4\right)-\frac{75.3982237}{2}\arctan\left(\frac{k+4}{2}\right)-43.9822972\ln\left(k+7\right)-\frac{64024.6224908}{5950.654475}-\frac{34.5575192}{2}\ln\left(8\right)$
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Step-by-step Solution

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We can factor the polynomial $y^3+15y^2+76y+140$ using the rational root theorem, which guarantees that for a polynomial of the form $a_nx^n+a_{n-1}x^{n-1}+\dots+a_0$ there is a rational root of the form $\pm\frac{p}{q}$, where $p$ belongs to the divisors of the constant term $a_0$, and $q$ belongs to the divisors of the leading coefficient $a_n$. List all divisors $p$ of the constant term $a_0$, which equals $140$

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$1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140$

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Learn how to solve problems step by step online. Find the integral piint((y(y^2+12y+61))/(y^3+15y^276y+140))dy&-6&k. We can factor the polynomial y^3+15y^2+76y+140 using the rational root theorem, which guarantees that for a polynomial of the form a_nx^n+a_{n-1}x^{n-1}+\dots+a_0 there is a rational root of the form \pm\frac{p}{q}, where p belongs to the divisors of the constant term a_0, and q belongs to the divisors of the leading coefficient a_n. List all divisors p of the constant term a_0, which equals 140. Next, list all divisors of the leading coefficient a_n, which equals 1. The possible roots \pm\frac{p}{q} of the polynomial y^3+15y^2+76y+140 will then be. Trying all possible roots, we found that -7 is a root of the polynomial. When we evaluate it in the polynomial, it gives us 0 as a result.

Final answer to the problem

$\pi k+\frac{34.5575192}{2}\ln\left(\left(k+4\right)^2+4\right)-\frac{75.3982237}{2}\arctan\left(\frac{k+4}{2}\right)-43.9822972\ln\left(k+7\right)-\frac{64024.6224908}{5950.654475}-\frac{34.5575192}{2}\ln\left(8\right)$

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Function Plot

Plotting: $\pi k+\frac{34.5575192}{2}\ln\left(\left(k+4\right)^2+4\right)-\frac{75.3982237}{2}\arctan\left(\frac{k+4}{2}\right)-43.9822972\ln\left(k+7\right)-\frac{64024.6224908}{5950.654475}-\frac{34.5575192}{2}\ln\left(8\right)$

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9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
2

e
π
ln
log
log
lim
d/dx
Dx
|◻|
θ
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

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