### Math MCQ - English

# If a,d and Sn are first term, common difference and sum of first nth terms of se

Home | Discussion Forum** If a,d and Sn are first term, common difference and sum of first nth terms of series, then Sb =**

n/2[2a+(n-1)d]

n/2[a+(n-1)d]

n/[2a+(n-1)d]

a+(n-1)d

Answer : A

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