Question

If a=2 and d=2, then s15
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Answer 1

Answer:

incomplete question

Step-by-step explanation:

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Answer 2

an= a+ (n-1)d

given-

a= 2

d= 2

an= 15

equate this in the equation

15= 2+ (n-1) 2

15-2 = (n-1) 2

13/ 2 = (n-1)

6.5 = n-1

n= 6.5 + 1 = 7.5