" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Un = n²- 3n -[(n - 1)² - 3(n - 1)]
Un = n²- 3n -[n² - 2n + 1 - 3n + 3]
Un = n²- 3n -[n² - 5n + 4]
Un = n²- 3n - n² + 5n - 4
Un = 2n - 4