Question

What is the sum of the arithmetic sequence 174, 168, 162 …, if there are 33 terms?

2,541

2,574

2,607

2,640

Answer 1

a=174
c.d. d=168-174=-6
n=33
\[Sn=\frac{ n }{ 2 }\left\{ 2a+\left( n-1 \right)d \right\}\]
find S33.

Answer 2

Please help with a little more im getting a decimal

Answer 3

??

Answer 4

\[S33=\frac{ 33 }{2 }\left\{ 2*174+\left( 33-1 \right)\left( -6 \right) \right\}\]
\[=33\left\{ 174+32\left( -3 \right) \right\}=33\left( 174-96 \right)=33*88=?\]

Answer 5

2,904

Answer 6

correction 174-96=78 not 88
33*78=?

Answer 7

2,574

Answer 8

yes.

Answer 9

thank you

Answer 10

yw