This week in pre-calculus 11 I learned about modeling problems with quadratic function. I was a little bit confused about how to solve that kind of questions but after few practicing, I learned how to solve those questions.
Here is an example:
This week in precalculus11 I learned about analyzing the quadratic function of the form . Each of these words represents something on the graph.
a is the coefficient. It shows the stretch or compression of the parabola. If a > 0 parabola becomes skinnier, and if a < 1the parabola becomes wider. Also, a shows whether the parabola opens up or reflect down.
P represents horizontal translation.
q represents vertical translation.
Here is an example:
This week in precalculus 11 I learned about discriminant. It was an easy lesson. The expression , is called discriminant of the quadratic equation because it discriminates among the types of possible solution. Here is an example:
calculate the value of the discriminant of this quadratic equation.
first step: write down the equation first
second step: write down what is a, b and c
a= 2 b=-8 c= 4
third step: put everything in the equation
64+32=96
this equation has two real roots so 97> 0
This week in Pre calculus11, I learned about the geometric sequence. In this lesson, I had a little bit of struggling when the question gives me two terms and asks for the unknown term. After understanding what the question is asking I learned how to solve this type of questions. Here is an example:
This week in Pre calculus11, I learned about the Arithmetic sequence. This lesson was an easy lesson, but I had a little bit of struggling at first when I had to solve the question that seemed a little bit hard for me, but after several practicing, I learned how to solve the question, Here is the Example:
Example 1: How many terms are in the sequence 2, 6, 10, 14,…….,50
first step:
we know the first term is 2, the common difference is 4, and we say the is 50
second step:
the equation is=> = +(n-1)d
third step:
Now we could put the things that we know in the equation:
50= 2 +(n-1)4
forth step:
we don’t know what is n in (n-1) so we would multiply the common difference which is 4 by n and -1
50= 2 +4n-4
Last step:
so now we put the unknown on one side and the known on the other side
50-2+4= 4n
52= 4n
=
n= 13
so there are 13 terms in that sequence
Trempette aux aubergines et aux noix
Les ingrédients :
4 cuillères à soupe d’huile de canola
½ tasse d’eau
3 aubergines pelées et salées
1/16 de poivre noir
⅓tasse de noix concassées
2 gousses d’ail émincées
½ cuillère à thé de sel de mer
1 gros oignon, pelé et coupé en dés
3 cuillères à soupe d’huile végétale
¾ tasse de yaourt grec
2 cuillerées à thé de feuilles de menthe séchées et broyées
Étapes :
2. Faites chauffer 4 cuillères à soupe d’huile végétale dans une poêle antiadhésive moyenne à feu moyen-élevé. Faites frire les aubergines jusqu’à ce qu’elles soient dorées d’un côté. Retournez-les aubergines, puis faites-les cuire de l’autre côté ou jusqu’à ce que les aubergines puissent être facilement fourrées avec une fourchette. Ne laissez pas les aubergines sans surveillance. La chaleur élevée les brûlera très rapidement.
3. Entre-temps, dans une autre poêle, chauffez 3 cuillères à soupe d’huile à feu moyen et faire revenez l’oignon coupé en dés jusqu’à ce qu’il soit doré.
Paragraphe:
J’ai choisi cette recette parce que c’est un iranien et notre nourriture culturelle. En outre, c’est un très délicieux, alors c’est un de mes plats préférés. C’est pourquoi j’ai choisi cette recette parce que je veux que tout le monde essaie une trempette aux aubergines at aux noix.