Asked by cutey pie rachel
Evaluate the series the lower limit of summation notation is 'n = 3"
8
E 5n
n=3
what do you do first?
8
E 5n
n=3
what do you do first?
Answers
Answered by
Steve
one way: just list the terms:
15,20,25,30,35,40
now add 'em up.
Or, recognize this an an A.P. with
a=15
d=5
and you want to sum the first 6 terms:
S6 = 6/2 (2*15+5*5) = 165
15,20,25,30,35,40
now add 'em up.
Or, recognize this an an A.P. with
a=15
d=5
and you want to sum the first 6 terms:
S6 = 6/2 (2*15+5*5) = 165