Math, asked by parasrajpurohith775, 2 months ago

find s13 of an AP whose a7=6 and the common difference is 2

Answers

Answered by jswsanjaysingh1970

5

Step-by-step explanation:

s13=n/2(2a+(n-1)d

s13=13/2(2×7 + 13-1 × 2

s13=13/2 (14 +24)

s13= 13/2 (38)

s13=494/2

s13=247

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