" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a3=a1+2r
a5=a1+4r
a5-a3=2r
2r=4-6
2r=-2
a1=a3-2r
a1=6-(-2)
a1=8