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by jon80
Thu Oct 04, 2012 8:28 pm
Forum: Calculus
Topic: Do convex/concave curves have a negative/positive gradient?
Replies: 1
Views: 1744

Do convex/concave curves have a negative/positive gradient?

We are studying indifference curves in economics, and these are applied to marginal utility calculations, thus some mathematical background would be appreciated. Do convex curves have a negative or positive dy/dx? Would you kindly explain the theorem please?
by jon80
Sun Sep 30, 2012 4:55 pm
Forum: Calculus
Topic: how to calculate the tangent of a linear equation
Replies: 1
Views: 4186

how to calculate the tangent of a linear equation

Is it correct to deduce the tangent of f(x) = 5x^3 + 5x^2 + x + 1 at x = 0.5 to be y = 9.75x - 1.5? If yes, could you show the workings? I have this software named Graph v4.4 (http://www.padowan.dk), which deduced the tangent above, and, according to my knowledge the tangent would be calculated by d...
by jon80
Sat Sep 29, 2012 8:51 am
Forum: Advanced Algebra ("pre-calculus")
Topic: Linear equation deduction enigma
Replies: 2
Views: 4571

Linear equation deduction enigma

In economy A there are two types of labour (say, skilled and unskilled). The economy produces two goods (x and y) which can be produced either by skilled labour or unskilled one. Skilled labour can produce either 400 units of y or 200 units of x (or any linear combination of the two). Unskilled labo...
by jon80
Fri Sep 28, 2012 6:00 am
Forum: Intermediate Algebra
Topic: algebraic problem: logic behind a graphing dilemma?
Replies: 1
Views: 3436

algebraic problem: logic behind a graphing dilemma?

I am trying to find the point of intersection of the following graphs, and, wondering whether it may help me with the logic behind a graphing dilemma that I have with an economic problem, because somehow I am thinking that the point of intersection for the production possibility curve represents som...
by jon80
Sun Sep 23, 2012 1:52 pm
Forum: Pre-Algebra
Topic: How do I figure out the function of a graph?
Replies: 1
Views: 2998

How do I figure out the function of a graph?

I am trying to figure out the function of a graph that I sketched, and, I think I am getting it wrong. Please include the workings and sources of reference so I can look up similar problems in the future, please. What is the gradient anyway? A copy of the sketched graph is available at https://skydr...

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