Find the sum of the first n terms of the following arithmetic sequence.
-$$\mathrm { a } _ { 1 } = - 5 , \mathrm {~d} = - 6 ; \mathrm { n } = 10$$
A) 220
B) 295
C) $- 295$
D) $- 320$

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The Answer of Find the sum of the first n terms of the following arithmetic sequence.
-$$\mathrm { a } _ { 1 } = - 5 , \mathrm {~d} = - 6 ; \mathrm { n } = 10$$
A) 220
B) 295
C) $- 295$
D) $- 320$

Find the Sum of the First N Terms of the Following