SuicideFuel Prolem

[trying to ascend]

If the coefficients of x³ and x4 in the expansion of (1+ ax+ bx2 ) (1−2x) to the power of 18 in powers of x are both zero, then (a, b) is equal to:

 

[Deleted member 42077]

Los pollos hermanos bucket meal.

 

[trying to ascend]

Los pollos hermanos bucket meal.

How much does it cost?

 

[HighTGymcel]

If the coefficients of x³ and x4 in the expansion of (1+ ax+ bx2 ) (1−2x) to the power of 18 in powers of x are both zero, then (a, b) is equal to:

its equals to incels not getting pussy

 

[Ducky]

R all real numbers

 

[Intellau_Celistic]

R all real numbers

The answer is 'S'

​

 

[Ducky]

The answer is 'S'

​

I forget how to do this kind of math. I didnt pay attention on binomial theorem day. Waste of time tbh.

 

[NoBitches]

If the coefficients of x³ and x4 in the expansion of (1+ ax+ bx2 ) (1−2x) to the power of 18 in powers of x are both zero, then (a, b) is equal to:

Interpreting this as
(1+ax+bx^2)(1-2x)^18

(1-2x)^18=
1 +18c1(-2x)+18c2(-2x)^2+18c3(-2x)^3+18c4(-2x)^4......(But its not relevent to compute further)
-36b+612a-6528=0 (Total of x^3)
612b-6528a+48960=0 (Total of x^4)
a=16, b=272/3