Question

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Answer 1

Explicación paso a paso:

N = [(a+1)a(a+1)a(a+1)(a+2)] = 21

(a+1)(a+2)⁴ + a(a+2)³ + (a+1)(a+2)² + a(a+2) + (a+1) = 441

(a+1)[(a+2)⁴+(a+2)²+1] + a(a+2)[(a+2)²+1] = 21

a = 0

(0+1)[(0+2)⁴+(0+2)²+1] + 0(0+2)[(0+2)²+1] = 21

1[16+4+1] + 0 = 21

21 = 21

Piden :

P(a) = a² + a + 2 = 0² + 0 + 2 = 2