A pattern of bločks is shown below. Term 1 Term 2 Term 3 Term 4 If the pattern of blocks continues, which formula(s) could be used to determine the number of blocks in the nth term? I II III a = 2 a, = n + 4 a, = 4n – 2 an = a, -1+ 4 I and II 1. I and III 2. 3. Il and III 4. III, only

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