can someone help me solve and understand this? will fan and give medal!:)

What is the sum of the finite arithmetic series? 26 + 29 + 32 + 35 + 38 + 41 + 44 (1 point)

219
245
–193
201

Question

can someone help me solve and understand this? will fan and give medal!:)

What is the sum of the finite arithmetic series? 26 + 29 + 32 + 35 + 38 + 41 + 44 (1 point)

219
245
–193
201

anonymous · Answer

245

anonymous · Answer

how did u get that?

anonymous · Answer

ADDED them checked my answer with mathway

anonymous · Answer

(26+44)+(29+41)+(32+38)+35
=70*3+35
=?

anonymous · Answer

or $$Sn=\frac{ n }{ 2 }\left( a+l) \right)$$
here n=7,a=26,l=44
calculate S7

anonymous · Answer

you just add them up the s7=245

anonymous · Answer

its more than just adding.. heres the example from the lesson:
(1 + 100) + (2 + 99) + (3 + 98) + … + (49 + 52) + (50 + 51) = 50*101 = 5050.

anonymous · Answer

http://wn.com/infinite_arithmetic_series

anonymous · Answer

245.

mathmale · Answer

Angel Rose has come up with a cool resource: a video about arithmetic series. Some of you may be interested in another perspective: http://www.purplemath.com/modules/series4.htm This web page includes the formula suggested buy Surjithayer and provides examples as well.