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Find the integral $\int\frac{x^2+1}{x^2+x+1}dx$

Step-by-step Solution

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Final Answer

$x+\frac{\sqrt{3}}{3}\arctan\left(1.154696\left(x+\frac{1}{2}\right)\right)+\frac{1}{\log^{3}\left(10\right)}\ln\left(\frac{\frac{\sqrt{3}}{2}}{\sqrt{\frac{3}{4}+\left(x+\frac{1}{2}\right)^2}}\right)+C_0$
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Step-by-step Solution

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Divide $x^2+1$ by $x^2+x+1$

$\begin{array}{l}\phantom{\phantom{;}x^{2}+x\phantom{;}+1;}{\phantom{;}1\phantom{;}\phantom{;}}\\\phantom{;}x^{2}+x\phantom{;}+1\overline{\smash{)}\phantom{;}x^{2}\phantom{-;x^n}+1\phantom{;}\phantom{;}}\\\phantom{\phantom{;}x^{2}+x\phantom{;}+1;}\underline{-x^{2}-x\phantom{;}-1\phantom{;}\phantom{;}}\\\phantom{-x^{2}-x\phantom{;}-1\phantom{;}\phantom{;};}-x\phantom{;}\phantom{-;x^n}\\\end{array}$

Learn how to solve integrals of rational functions problems step by step online.

$\begin{array}{l}\phantom{\phantom{;}x^{2}+x\phantom{;}+1;}{\phantom{;}1\phantom{;}\phantom{;}}\\\phantom{;}x^{2}+x\phantom{;}+1\overline{\smash{)}\phantom{;}x^{2}\phantom{-;x^n}+1\phantom{;}\phantom{;}}\\\phantom{\phantom{;}x^{2}+x\phantom{;}+1;}\underline{-x^{2}-x\phantom{;}-1\phantom{;}\phantom{;}}\\\phantom{-x^{2}-x\phantom{;}-1\phantom{;}\phantom{;};}-x\phantom{;}\phantom{-;x^n}\\\end{array}$

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Learn how to solve integrals of rational functions problems step by step online. Find the integral int((x^2+1)/(x^2+x+1))dx. Divide x^2+1 by x^2+x+1. Resulting polynomial. Simplify the expression inside the integral. The integral \int1dx results in: x.

Final Answer

$x+\frac{\sqrt{3}}{3}\arctan\left(1.154696\left(x+\frac{1}{2}\right)\right)+\frac{1}{\log^{3}\left(10\right)}\ln\left(\frac{\frac{\sqrt{3}}{2}}{\sqrt{\frac{3}{4}+\left(x+\frac{1}{2}\right)^2}}\right)+C_0$

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Function Plot

Plotting: $x+\frac{\sqrt{3}}{3}\arctan\left(1.154696\left(x+\frac{1}{2}\right)\right)+\frac{1}{\log^{3}\left(10\right)}\ln\left(\frac{\frac{\sqrt{3}}{2}}{\sqrt{\frac{3}{4}+\left(x+\frac{1}{2}\right)^2}}\right)+C_0$

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1
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3
4
5
6
7
8
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

How to improve your answer:

Main Topic: Integrals of Rational Functions

Integrals of rational functions of the form R(x) = P(x)/Q(x).

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