" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
r = - 2/3
a₁₀ = a₁ + 9r = - 0,5 + 9 * - 2/3 = - 0,5 - 18/3 = - 0,5 - 6 = - 6,5
S₁₀ = (a₁ + a₁₀) * 10/2 = (- 0,5 - 6,5) * 5 = - 7 * 5 = - 35
odp A