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Maki Shijo
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« Reply #885 on: September 21, 2018, 09:20:45 AM »

Grade 7 was the worst for me.. Bullying and Sucidal Thoughts.. Ahhhhhhhhh
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Makima
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« Reply #886 on: September 21, 2018, 09:40:55 AM »

Grade 7 was the worst for me.. Bullying and Sucidal Thoughts.. Ahhhhhhhhh
Same. But such days even extended until I got kicked at the end of Grade 9
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« Reply #887 on: September 21, 2018, 11:35:09 AM »


Need to know if the integral is convergent or divergent by limit comparison test or direct comparison
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« Reply #888 on: September 21, 2018, 11:40:55 AM »

i prefer my new class over the middle school one
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Lovaho
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« Reply #889 on: September 21, 2018, 03:31:55 PM »

grade 8 was and always will be my worst year of schooling
Has.
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« Reply #890 on: September 21, 2018, 06:18:46 PM »

Sine is positive in the interval 0<=x<=π, so we know,
sqrtx<=sqrtx+sinx.
Taking the reciprocal of both sides (don't forget to reverse the inequality sign) we get,
1/sqrtx>=1/(sqrtx+sinx).
Now we consider the integral
∫1/sqrtxdx where 0<=x<=π.
We can now apply the exponential property sqrtx=x^1/2.
∫1/x^(1/2)dx where 0<=x<=π.
Next, we apply another exponential identity, namely 1/x^a=x^-a. Doing this we get,
∫x^(-1/2)dx where 0<=x<=π.
Now we integrate.
2x^(1/2) from 0<=x<=π.
Finally, using the fundamental theorem of calculus we obtain
2π^(1/2)-2(0^(1/2))=2π^(1/2).
Thus the integral ∫1/sqrtxdx where 0<=x<=π converges, and since 1/sqrtx>=1/(sqrtx+sinx) the integral ∫1/(sqrtx+sinx)dx where 0<=x<=π also converges.
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HungryCat
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« Reply #891 on: September 21, 2018, 11:56:59 PM »

x + (x + 2) . 5 - 10
I hate equations damnit
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Alex Amethyst
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« Reply #892 on: September 22, 2018, 02:14:08 AM »

x + (x + 2) . 5 - 10
I hate equations damnit
From what I understand that dot is supposed to show multiplication
Therefore, we multiply everything inside the parentheses by 5, so:
x + 5x + 10 - 10

From here it's: 6x + 0 or 6x

And we can't go anywhere else because either you wrote something wrong (like the subtraction symbol instead of the equality symbol) or it was supposed to be like that.
In case there was truly something wrong with the equation, please provide me the correct one and we can work with that Smiley
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« Reply #893 on: September 22, 2018, 05:07:14 AM »

x + (x + 2) . 5 - 10
I hate equations damnit

Whats the question? Find x?
The way you wrote it can only be simplified and not solved.
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« Reply #894 on: September 22, 2018, 06:14:22 AM »

Grade 7 was the worst for me.. Bullying and Sucidal Thoughts.. Ahhhhhhhhh
me with 6th grade
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« Reply #895 on: September 22, 2018, 06:28:29 AM »


Yas. *
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Alex Amethyst
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« Reply #896 on: September 22, 2018, 08:10:43 AM »

Whats the question? Find x?
The way you wrote it can only be simplified and not solved.


I was thinking the same thing.
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« Reply #897 on: September 22, 2018, 08:45:18 AM »

grade 8 was and always will be my worst year of schooling
I'm in grade 8 rn and I gotta say it is WORSE than 7 and 6, which I thought was the worst years...
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« Reply #898 on: September 24, 2018, 07:38:19 AM »

Integral of x/(4+9x^4)
Integral of 1/sqrt(6x-x^2)
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« Reply #899 on: September 24, 2018, 04:02:37 PM »

I got accepted into COLLEGE! Hooray
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