Find the Partial Sum $\mathrm { a } _ { \mathrm { n } } = - 9 \mathrm { n }$

question 36

Multiple Choice

Find the partial sum.
-Find the sum of the first five terms of the sequence whose general terms is $\mathrm { a } _ { \mathrm { n } } = - 9 \mathrm { n }$ .

• A) \(- 27\)
• B) \(- 135\)
• C) \(- 90\)
• D) 135

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