Answer:
1.35764501988
Step-by-step explanation:
Answer: If the initial term of an arithmetic sequence is a 1 and the common difference of successive members is d, then the nth term of the sequence is given by: a n = a 1 + (n - 1)d The sum of the first n terms S n of an arithmetic sequence is calculated by the following formula: S n = n (a 1 + a n)/2 = n [2a 1 + (n - 1)d]/2
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Because the decimal is over 40 the answer is 15
Answer:
240
Step-by-step explanation:
