All Questions ⁺⁰237779 Questions

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1111

5

+343

I need help in a matrix problem

I have this matrix A= and i need to find matrix P,Q so that PAQ= But i find after trades for lines the 3,4 element its 1 and this cannot change with trades at columns.I'm correct and if not where im wrong? Thank read more ..

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Dimitristhym Nov 1, 2018

+1

932

8

+1124

Good day all you good people!,

Good day all you good people!,

I have something here I need to understand..please help me:
read more ..

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juriemagic Nov 1, 2018

0

459

1

URGENT! I've been struggling all day with compound interests

Using this formula:
P = A(r/n) / 1-(1+ r/n)^-nt
where A = 153000 r= 4.5% (0.045) n=12
read more ..

Guest Nov 1, 2018

0

587

1

help plz

How many integers $m$ are there such that $0

Guest Nov 1, 2018

0

2698

5

Probability question

A box contains six cards. Three of the cards are black on both sides, one card is black on one side and red on the other, and two of the cards are red on both sides. You pick a card uniformly at random from the box and look at a random side. read more ..

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Guest Nov 1, 2018

0

1262

2

Please help.

Let $n$ be a positive integer. What is the greatest possible value of $\gcd(n + 7, 2n + 1)$?

Guest Nov 1, 2018

Oct 31, 2018

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1375

4

Prove that \[1{n\choose 1} + 2{n\choose 2} + 3{n \choose 3} + \cdots + n{n\choose n} = n2^{n-1}\]for all positive integers $n$.

Prove that \[1{n\choose 1} + 2{n\choose 2} + 3{n \choose 3} + \cdots + n{n\choose n} = n2^{n-1}\] for all positive integers n.

This might be a repost of one of Mellie's questions, but I don't know. read more ..

Guest Oct 31, 2018

+1

1774

3

+1246

Geometry

In the following diagram, AB=50. Find AX.

Lightning Oct 31, 2018

+9

4

2851

10

+37170

Blank questionion

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ElectricPavlov Oct 31, 2018

2 Online Users