Arithmetic Sequence
Sequence and series · Common difference · The nth term
Tell a sequence from a series
Decide whether a sequence is an AP
Find the common difference d
Use \( t_n = a + (n - 1)d \) to find any term
Pattern (i): 1, 3, 5, 7, 9 blocks. Add 2 each time.
Pattern (ii): 2, 4, 8, 16, 32 blocks. Double each time.
Both follow a fixed rule, so both are sequences.
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