" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a6= 11
a6=a3+3r
11=5+3r
3r+5=11
3r=11-5
3r=6 /:3
r=2
a3=a1+2r
5= a1+2*2
5= a1+4
a1+4=5
a1=1
a50= a3+ 47r
a50= 5+ 47*2
a50= 5+94
a50=99
S50= a1+a50 :2 *50= 1+99 :2 *50= 100 :2 *50= 50 *50= 2500
Odp. S50 wynosi 2500