Ratkaise sum=1+2 | Microsoftin matematiikan ratkaisija

Hyppää pääsisältöön

\sum = 1 + 2

Ratkaise muuttujan Σ suhteen

Σ = 3

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Määritä Σ

Σ : = 3

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Tietokilpailu

Linear Equation

\sum = 1 + 2

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Samanlaisia ongelmia verkkohausta

\sum a_{2 k}

\sum a_{m}

https://math.stackexchange.com/questions/1334518/if-sum-a-2k-exists-then-sum-a-m-exists/1334521

This is false. Let

a_{n} = {0, if n is even 1, otherwise

lim_{n \to \infty} s_{n} = 0

\sum_{m = 1}^{\infty} a_{m} = \infty

Probability of eight dice showing sum of 9, 10 or 11

https://math.stackexchange.com/questions/746970/probability-of-eight-dice-showing-sum-of-9-10-or-11

Your solution for

Σ = 9

is correct, but the other two are not. In place of the

8^{2}

8^{3}

, you should have

(2 8) + (1 8)

(3 8) + (1 8) (1 7) + (1 8)

How to know the (first term) in arithmetic sequence?

https://math.stackexchange.com/q/1253915

S_{n} = 165, d = 2, n = 15, a_{1} = ?

S_{n} = \frac{n}{2} (2 a_{1} + (n - 1) d)

\frac{1 5}{2} (2 a_{1} + (15 - 1) 2) = 165

a_{1} + 14 = 11

a_{1} = - 3

Combinatorics problem involving a regular expression

https://math.stackexchange.com/questions/1003936/combinatorics-problem-involving-a-regular-expression

Thanks to @Callus for helping me figure out the flaw in my solution. After some adjustments, I figured out how to solve it. My revised answer does not involve inclusion-exclusion (but if anyone is ...

Does this weird series converge?

https://math.stackexchange.com/questions/1337074/does-this-weird-series-converge

S

8

one digit integers,

8 \cdot 9

two digit integers,

8 \cdot 9^{2}

three digit integers, etc. So, the sum

n \in S \sum \frac{1}{n}

8

terms that are at ...

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Kopioitu leikepöydälle

Σ=3

Selvitä 3 laskemalla yhteen 1 ja 2.

Esimerkkejä

Toisen asteen yhtälö

x^{2} - 4 x - 5 = 0

4 sin θ cos θ = 2 sin θ

Ensimmäisen asteen yhtälö

y = 3 x + 4

699 * 533

[2534] [2 - 1 0135]

Samanaikainen kaava

{8 x + 2 y = 46 7 x + 3 y = 47

\frac{d}{d x} \frac{( 3 x ^{2} - 2 )}{( x - 5 )}

\int_{0}^{1} x e^{- x^{2}} d x

x \to - 3 lim \frac{x ^{2} - 9}{x ^{2} + 2 x - 3}