" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
a₄ = -2
z właściwości ciągu geometrycznego
a₃= a₁*q²
a₄= a₁*q₃
i podstawiasz
4 = a₁*q²
-2 = a₁*q³
a₁ = 4/q²
-2 = 4/q²*q³
-2 = 4q
q = -2/4 = -1/2
a₁ = 4/(-1/2)² = 4/1/4 = 4*4 = 16
Czyli a₁ = 16