" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
entonce r=2
b) an=a1+(n-1)r=2+(n-1)2=2+2n-2=2n
an=2n
c) a30=a1+(n-2)r=2+(30-1)2=2+29*2=2+58=60
a30=60
6) a10=32 d=5
a10=a1+(10-1)5=32
a1+45=32
a1=-13
entonce a25=a1+(25-1)5=-13+24*5=-13+120=107
a25=107
7) a8=12 a12=32
a8=a1+7r=12
a12=a1+11r=32
a1+7r-a1-11r=12-32
-4r=-20
r=5
a1+7*5=12
a1=12-35=-23
an=a1+(n-1)r=-23+(n-1)5=-23+5n-5=5n-28