Question

Interpole 4 meios aritmericos entre 1 e 16

Answer 1

Encontrar a razão da PA

an = a1 + ( n -1) . r
16 = 1 + ( 6 -1) . r
16 = 1 + 5r
15 = 5r  
r = 15 / 5
r = 3

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an = a1 + ( n -1) . r = an
an = 1 + ( 1 -1) .3 = 1
an = 1 + ( 2 -1) .3 = 4
an = 1 + ( 3 -1) .3 = 7
an = 1 + ( 4 -1) .3 = 10
an = 1 + ( 5 -1) .3 = 13
an = 1 + ( 6 -1) .3 = 16


PA = (1, 4, 7, 10, 13, 16)