B. Write a recursive formula for the following explicit formula: an=-12+6n

1. an= an-1+6; a1=-6

2. an=-12+6n

3. an= an-1+6; a1=-12

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Given: △acm, m∠c=90°, cp ⊥ am , ac: cm=3: 4, mp-ap=1. find am.

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