consider the arithmetic sequence 5 9 13 what is its sum of of its first 30 terms
Answers
Answered by
0
Answer:
1890
Step-by-step explanation:
here, a= 5
d= 9-5=4
n = 30
then by formula,
Sn = n÷ 2 [2a + ( n-1 ) d]
= 30 ÷ 2 [2 × 5 + ( 30-1 ) × 4 ]
= 15 ( 10 + 29 × 4 )
= 15 × 126
= 1890
Answered by
0
Answer:
Step-by-step explanation:
n is the 30 th term
hope this will help you
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