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Why would an increase in demand for a good cause an increase in price for a good?

Imagine that there are 10 apples to be sold at $1 each and that there are 10 people wanting to buy (demanding) an apple each. Now imagine there is an apple health-craze in this country and so now there ar...

AK
Answered by Anna K. Economics tutor
2368 Views

How do you prove the 1^2 +2^2+.....+n^2 = n/6 (n+1) (2n+1) by induction?

There are three simple steps to prove anything by induction.

Step 1: When n=1

12=1

then: 1/6 x 1x (1+1) x (2+1)

=1x2x3/6 =1

Therefore it is true for n=1 

...
VI
Answered by Vaisaalii I. Maths tutor
3981 Views

Is "ser" always used to express something permanent and "estar" for something temporary?

This is a common misconception when learning to distinguish ser and estar. There are many rules and exceptions regarding this. Here's an example: "Mi abuela es mayor" vs "Mi abuela está may...

EJ
Answered by Erlei J. Spanish tutor
2416 Views

Express the following as a partial fraction: (4x^2+12x+9) / (x^2+3x+2) .

We first notice that the degree of the numerator is the same as the degree of the denominator so we have an improper fraction which we need to separate into an integer and a proper fraction before we can ...

AP
Answered by Antonia P. Maths tutor
4637 Views

What is the difference between the perfect tense and the imperfect tense?

Both tenses are used to describe something that happened in the past. In every day conversation, the perfect tense is almost always used e.g. j'ai joué, j'ai trouvé.... When writing, the perfect tense is ...

AC
Answered by Antoinette C. French tutor
1816 Views

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