Matura Czerwiec 2018 zadanie 33 W ciągu arytmetycznym an, określonym dla liczb naturalnych n ≥ 1 , w

http://akademia-matematyki.edu.pl/ In the arithmetic progression an, defined for natural numbers n ≥ 1, the sixth term is twice the fifth term, and the sum of the first ten terms of this progression is S10 = 15/4. Calculate the first term and the common difference of this progression. Source: Educational Office. Collection of exercises for high schools and technical schools. Marcin Kurczab, Elżbieta Kurczab, Elżbieta Świda. Mathematics 1 Art. 29. Right of Quotation In works constituting a self-contained whole, it is permitted to quote fragments of published works, as well as published works of art, photography, or small works in their entirety, to the extent justified by the purposes of the quotation, such as explanation, polemic, critical or scientific analysis, teaching, or the rights of the creative genre.