3 years ago

Whats 91 divided by 2605

Mathematics

2 answers:

riadik2000 [5.3K]3 years ago

6 0

Answer: 0.34339622641509433962264150943396

Step-by-step explanation: I basically just divided, but if you wanted the rounded version, it is 0.34

zhenek [66]3 years ago

6 0

Answer:

91/2605=0.03493282149

2605/91=28.6263736264

DON'T FORGET TO ROUND HOPE THIS HELPS

Step-by-step explanation:

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Lina20 [59]

Answer:

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2 years ago

Calculate the coefficient of x4y18 in the expansion of (x − y)22

Oksana_A [137]

Binomial theorem:

$(x-y)^n=\displaystyle\sum_{k=0}^n\binom nkx^k(-y)^{n-k}$

The term with $x^4y^{18}$ corresponds to $n=18+4=22$ and $k=4$ (or $k=18$ , since $\dbinom nk=\dbinom n{n-k}$ ).

So, the coefficient of this term is

$\dbinom{22}4(-1)^{18}=\dbinom{22}4=\dfrac{22!}{4!(22-4)!}=7315$