The first term of an arithmetic sequence is 2 and common difference is 4.
a) the sum of first ten terms of this sequence
Answers
Answered by
1
Answer:
200
Explanation:
as we know the formula.. n/2*(2a+(n-1)d)
by applying it we get 200
Answered by
2
Answer:
as per formula n= 10 , a= 2 ,d=4 , Sn =n+(n+1)/2 , 10/2(2×2+(10-1)4)=5(4+(9×4))=5×40 =200
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