90

72

18

0 (100% valid answer)

72 goddamn people.

The answer is fucking 9.
2 does not equal 6, 3 does not equal 12, etc.
It doesn't matter how many wrong solutions are written above the problem, 9=9
>Inb4 "What about another number system"

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>>691119983

>>691120741
/thread

90
2*2+2=6
3*3+3=12
4*4+4=20
5*5+5=30
6*6+6=42
9*9+9=90
N=a*a+a

>>691119983
Only for geniuses? for real? This shit is basic

>>691119983
Why does everyone always make it more complicated than it has to be?
2*3=6
3*4=12
4*5=20
5*6=30
6*7=42
Therefore 9*10=90

>>691121040
WHOAH! Outside of the size constraints 0 < gamma(?) < 1 and t > 0, I can actually solve that. Calculus based physics is teaching me things!

>>691119983
tree fiddy

Based on the calculations/numerical statements:

y= x * (x+1)

x = 9

y = 9 * (9+1)
y = 9*10
y = 90

>>691121040
OP here. I've only done undergrad math work as an EE major. I don't know those fancy gamma functions and whatnot

2×3=6
3×4=12
4×5=20
5×6=30
6×7=42
7×8=56
8×9=72
9×10=90
9=90 Dumbasses. Follow the trend.

54

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>>691121258
Γ(z) is valid for z∈ℂ\{0, -1, -2, -3, ...}. The constraints are for the contour of integration and the locations of the poles of the integrand.

6 +6 = 12
12 + 8 = 20
20 + 10 =30
30 + 12 = 42
42 + 14 = 56
56 + 16 =72
72 + 18 =90

This la how it goes. 6-8-10-12-14-16-18 so 9 = 90
Easy but nice

>>691121372
ah, overlooked something....

Without any given rule to follow the concideration of a possible formula belongs to the person itself. Therefore any number may be the right one

If 2=6 6=2 not 42

>>691120179
fist answer is best.>>691120960
also correct but really asshole answer lol

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>>691121339
That is undergrad math.

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>>691119983
90

>>691121029
this tho.

>>691119983
Upside down 2

>>691121905
As an EE, I only took the basic calc up to diffy q's

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>>691122112
That would make sense for EE, so I see your point.

>>691120741
Agree

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>>691121086
It's a little simpler than that
2*3=6
3*4=12
4*5=20
5*6=30
6*7=42
9*10=90

>>691119983
The answer is 90. The pattern is n = n(n + 1).

/thread

>>691121086
Or N=a*(a+1)

>>691122223
Now that I can do, but I'm too lazy. Something like let u=that stuff in ln, and then IBP. Maybe some trig subs. It's summer man

>>691121029
Thr numvers on the left could be shorthand for saying 1st in the sequence, 2nd, etc...

>>691121086
You could even just figure out the pattern
2*3=6
3*4=12
4*5=20
5*6=30
6*7=42 therfore following the pattern 9*10=90

>>691122350
even simpler
0 + 6 = 12
12+ 8 = 20
20+10= 30
30+12= 42
42+14= 56
56+16= 72
72+18= 90

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>>691122472
You almost have the first substitution right but trig subs aren't the next step.

90 you cunt

>>691119983
>Reply
90

>>691122622
That is definitely not simpler. It also has no relation to the actual question.

90

>>691121063
>Saying /thread when you can't even do basic math

KYS faggot

>>691119983
72 or 90 and that is why this is bait.

NERDS

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>>691123345

>>691123266
OP here. The answer is 90

90

Tricky bastard

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84

The answer is 58. Thanks for admitting I am a genius OP

>>691122675
Well I may not know enough math to do this. Looking at the w|a solution, I don't recognize this Li function

https://www.wolframalpha.com/input/?i=integrate+sqrt((1-t+)%2F+(1%2Bt))+*+log(sqrt((1-t+)%2F+(1%2Bt)))

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>>691124113
OP here. You have officially earned this badge of honor.

This goes for anyone saying the answer is 72 as well

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>>691124165
You don't have to compute the indefinite integral to do these. Li₂(s) is the dilogarithm and there are simpler ways to do the integral (and in general the whole class of integrals) than using it.

>>691124503
Wait it's a cube root? The other image had a square root

90. It isn't hard, retards

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>>691124688
It's a square root in the other image. The two integrals I just posted are different than the previous two I posted, but they are of the same type.

>>691119983
An = n(n+1)
A9 = 9*10
A9 = 90

>>691119983
90

9*10

1/3
1/4
1/5
1/6
1/7
1/8
1/9
1/10

Im going with 75, what say you OP?

>>691119983
MUSLIMS DID GERMAN MASS SHOOTING

>>691124864

Wow, you morons now how to make shit difficult. The right column is inreasing by 2 ie; 6,8,10,12 etc. now if you can't do simple edition, this is truely a place for faggots

>>691121537
That's how I figured it out as well, some people took the fucking hard way it seems

Also, fucking store fronts every godamn time!

2 - 6
3 - 12
4 - 20
5 - 30
6 - 42
7 - 56
8 - 72
9 - 90

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>>691119983
i hacked it with python m9s

>>691126783
fake

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>>691126783
Bush strikes again

>>691126783
>python

>>691121086


It's n * ( n + 1 )

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>>691128630
Same thing. The difference of letter choice and choosing to factor the product or not makes no difference.