Find the Indicated Quantity of the Arithmetic Sequence $\mathrm { a } _ { 13 }$

question 58

Multiple Choice

Find the indicated quantity of the arithmetic sequence.
-a1 = 7 , d = 1 ; find $\mathrm { a } _ { 13 }$

• A)- 6
• B)- 5
• C)20
• D)19

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