Many students have problems with solving tasks concerning the existence of the derivative of a function at a point. In this paper we discuss some of them.
3
Dostęp do pełnego tekstu na zewnętrznej witrynie WWW
Many important mathematical notions can be introduced by means of the notions of supremum, infimum and equivalence class. Our considerations refer to mainly pupils of mathematical sections.
In the paper the authors analyse different shapes of an hourglass for the linearity of their graduation. We also assume that any hourglass (more precisely, each of the two congruent parts) has the shape of a solid of revolution and any cross section at height h of this hourglass depends on the base radius r, i.e. h = ƒ(r).
6
Dostęp do pełnego tekstu na zewnętrznej witrynie WWW
In this paper the authors propose a method of verifying formulae in normal modal logics. In order to show that a formula α is a thesis of a normal modal logic, a set of decomposition rules for any formula is given. These decomposition rules are based on the symbols of assertion and rejection of formulae.
8
Dostęp do pełnego tekstu na zewnętrznej witrynie WWW
Recurrent equations concern relationships between some (in general in a neighbourhood) elements of sequences. By these equations one can evaluate an arbitrary element of such sequences. In this paper we consider recurrent equations for the arithmetical and geometrical sequences of higher degree. We also give some properties of these sequences.
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.