PROBLEM #42: Find the sum, if it exists.
Example:
(THERE MAY BE A TYPO IN THIS ANWER. I think it is supposed to be S(lower 11 and not 51)
1
22
, ,
33
ar
==
11
andk
=
11
51
22
1
33
29.65
2
1
3
S
æö
æö
–
ç÷
ç÷
ç÷
èø
èø
==
–
1
1
n
n
aar
–
=
11
1
2
15
3
k
k
=
æö
ç÷
èø
å
(
)
11
1
1
1
2
15, now use the formula
31
n
k
n
k
ar
S
r
=
–
æö
=
ç÷
–
èø
å