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Langkau ke kandungan utama

12 + 11 + 6

= 29

Nilaikan

29

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Faktor

29

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Kuiz

12 + 11 + 6

Masalah Sama dari Carian Web

How do you evaluate

15 - 13 + 2

https://socratic.org/questions/how-do-you-evaluate-15-13-2

See below. Explanation: P.E.M.D.A.S. Parentheses Exponents Multiplication Division Addition Subtraction Addition comes before subtraction so we need to add

13

2

Is it possible to use partitions of an odd integer to generate primes in a given interval?

https://math.stackexchange.com/q/2718875

One counterexample is when

p = 31

q = 853 .

No partition of

31

33

yields the prime

q = 853 .

p \geq 7,

the only values greater than

(p - 2)^{2}

you can get from partitions of

p

(p - 2)^{2} + 2, (p - 2)^{2} + 4, (p - 1)^{2} + 1

On the difference of a sequence

https://math.stackexchange.com/questions/2400033/on-the-difference-of-a-sequence

This is just saying that

a_{n} - a_{1} = (a_{n} - a_{n - 1}) + (a_{n - 1} - a_{n - 2}) + \dots + (a_{3} - a_{2}) + (a_{2} - a_{1}) .

You can read about it here , for instance.

Counting Different Ways of Summing Numbers

https://math.stackexchange.com/questions/229956/counting-different-ways-of-summing-numbers

a_{n}

be the number of partitions of

n

with summands only in

{1, 2, 4}

b_{n}

the number of partitions with summands in

{1, 2}

b_{n} = ⌊ \frac{n}{2} ⌋ + 1

Find number of Distinct remainders when

2009

is divided by all natural numbers

https://math.stackexchange.com/q/1791790

1005, 1006, \dots, 2009

give us (backwards) all remainders

0, 1, 2, 3, \dots, 1004

. A larger remainder requires a divisor

> 1004

, but we have just tested all of these - except divisors

> 2009

Use induction to show

\sum_{j = 1}^{x} (4 j - 1) = x (2 x + 1)

https://math.stackexchange.com/questions/1747953/use-induction-to-show-sum-j-1x-4j-1-x2x1

Induction hypothesis (IH): For all

x \leq k

\sum_{j = 1}^{x} (4 j - 1) = x (2 x + 1)

\sum_{j = 1}^{k} (4 j - 1) = k (2 k + 1)

Then \begin{align} \sum_{j=1}^{k+1} (4j-1) &= \left(\sum_{j=1}^k ...

Kongsi

Disalin ke papan klip

23+6

Tambahkan 12 dan 11 untuk dapatkan 23.

29

Tambahkan 23 dan 6 untuk dapatkan 29.

Contoh

Persamaan kuadratik

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

4 sin θ cos θ = 2 sin θ

Persamaan linear

y = 3 x + 4

699 * 533

[2534] [2 - 1 0135]

Persamaan serentak

{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}