" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
41=3+(n-1)2
41=3+2n-2
41=1+2n
41-1=2n
40=2n
n=40/2
n=20
Un=a+(n-1)b
41 =3+(n-1)2
41=3+2n-2
41=1+2n
2n=40..n=20
Sn=1/2xn(a+Un)
=1/2 x 20 (3+41)
=10(44)
=440