interpole os 9 meios aritmético entre -12 e 48
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Encontrar a razão da PA
an = a1 + ( n -1) . r
48 = -12 + ( 11 -1) . r
48 = -12 + 10r
60 = 10r
r = 60/10
r = 6
====
an = a1 + ( n -1) . r = an
a1 = -12 + ( 1 -1) .6 = -12
a2 = -12 + ( 2 -1) .6 = -6
a3 = -12 + ( 3 -1) .6 = 0
a4 = -12 + ( 4 -1) .6 = 6
a5 = -12 + ( 5 -1) .6 = 12
a6 = -12 + ( 6 -1) .6 = 18
a7 = -12 + ( 7 -1) .6 = 24
a8 = -12 + ( 8 -1) .6 = 30
a9 = -12 + ( 9 -1) .6 = 36
a10 = -12 + ( 10 -1) .6 = 42
a11 = -12 + ( 11 -1) .6 = 48
PA = ( -12, -6, 0, 6, 12, 18, 24, 30, 36, 42, 48 )
an = a1 + ( n -1) . r
48 = -12 + ( 11 -1) . r
48 = -12 + 10r
60 = 10r
r = 60/10
r = 6
====
an = a1 + ( n -1) . r = an
a1 = -12 + ( 1 -1) .6 = -12
a2 = -12 + ( 2 -1) .6 = -6
a3 = -12 + ( 3 -1) .6 = 0
a4 = -12 + ( 4 -1) .6 = 6
a5 = -12 + ( 5 -1) .6 = 12
a6 = -12 + ( 6 -1) .6 = 18
a7 = -12 + ( 7 -1) .6 = 24
a8 = -12 + ( 8 -1) .6 = 30
a9 = -12 + ( 9 -1) .6 = 36
a10 = -12 + ( 10 -1) .6 = 42
a11 = -12 + ( 11 -1) .6 = 48
PA = ( -12, -6, 0, 6, 12, 18, 24, 30, 36, 42, 48 )
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