Respuesta :
The common difference for this arithmetic sequence 45, 39, 33, 27, 21, is -6
How to find the common difference of an arithmetic sequence here?
The formula for arithmetic sequence is described as follows:
aₙ = a + (n - 1)d
where
- n = number of terms
- d = common difference
- a = first term
Therefore, the common difference is the difference between the successive term and its preceding term.
Hence,
d = common difference = 39 - 45 = -6
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