What is the sum of the first 21 terms of the series given below?1 – 5 + 4 – 9 + 7 – 13 + 10 – 17 + ……………
Question
Solution 1
Para encontrar la suma de los primeros 21 términos de la serie dada, primero debemos identificar el patrón de la serie. Observamos que la serie alterna entre términos positivos y negativos.
La serie es: 1, -5, 4, -9, 7, -13, 10, -17, ...
Podemos separar la serie en dos subseries: una con los térmi Knowee AI is a powerful AI-powered study tool designed to help you to solve study problem.
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