3×2+6÷2easy points so just answer it

Mathematics

2 answers:

Sonja [21]2 years ago

6 0

Your answer is 9 and idk how

Calculator does it all.

irinina [24]2 years ago

4 0

Hi there!

Answer:

=9

Step-by-step explanation:

This question is about pemdas.

P-parenthesis

E-exponents

M-multiply

D-divide

A-add

S-subtract

*its should be go left to right.*

multiply and divide from left to right.

6+6/2

6+3

Hope this helps!

-Charlie

Have a great day!

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How do you integrate arctan(x dx? i think that if you simplify the integral you get:?

Temka [501]

Integration by parts will help here. Letting $u=\arctan x$ and $\mathrm dv=\mathrm dx$ , you end up with $\mathrm du=\dfrac{\mathrm dx}{1+x^2}$ and $v=x$ . Now

$\displaystyle\int\arctan x\,\mathrm dx=uv-\int v\,\mathrm du$
$\displaystyle\int\arctan x\,\mathrm dx=x\arctan x-\int\frac x{1+x^2}\,\mathrm dx$

For the remaining integral, setting $y=1+x^2$ gives $\dfrac{\mathrm dy}2=x\,\mathrm dx$ , so

$\displaystyle\int\frac x{1+x^2}\,\mathrm dx=\frac12\int\frac{\mathrm dy}y=\frac12\ln|y|+C=\frac12\ln(1+x^2)+C$

Putting everything together, you end up with

$\displaystyle\int\arctan x\,\mathrm dx=x\arctan x-\frac12\ln(1+x^2)+C$