Question

a partir del termino general, calcula los 4 primeros terminos:
a) an = n+20


b) bn = n2+4

Answer 1

Respuesta:

a) 21, 22, 23, 24, . . .

b) 5, 8, 13, 20, . . .

   

Explicación paso a paso:

a) an = n + 20

a1 = 1 + 20 = 21

a2 = 2 + 20 = 22

a3 = 3 + 20 = 23

a4 = 4 + 20 = 24

Serie = 21, 22, 23, 24, . . .

 

b) bn = n² + 4

b1 = 1² + 4 = 1*1 + 4 = 1 + 4 = 5

b2 = 2² + 4 = 2*2 + 4 = 4 + 4 = 8

b3 = 3² + 4 = 3*3 + 4 = 9 + 4 = 13

b4 = 4² + 4 = 4*4 + 4 = 16 + 4 = 20

Serie = 5, 8, 13, 20, . . .