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Sandaravasayago
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2. When solving a problem given the common difference and an nth term of an
arithmetic sequence, which formula will let you solve for the first term?
A. an = a + (n - 1)d
B. Sn = * [2a1 + (n − 1)d]
D. Sn=
21(1-ph)
1-r
C. an = airn-1​

Sagot :

ANSWER:

A.

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