X+7
——-=9
3
Can you explain step by step on how to solve this problem?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241. a) 0 b) 1 c) 2 d) 1 2

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