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Denis15
@Denis15
April 2020
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Qual é o 15* Termo da P.A (1,4,7,10...) ?
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mozarthrocha
A1 = 1
r = a2-a1
r = 4-1
r = 3
n = 15
an = a1+(n-1).r
a15 = 1+(15-1).3
a15 = 1+14.3
a15 = 1+42
a15 = 43
0 votes
Thanks 3
fernandanm
Resposta
r: Razão
r=
-
r = 4 - 1
r =3
=
+ (n-1) x r
= 1 + (15 - 1)x 3
= 1 + 14x3
= 1 + 42
= 43
1 votes
Thanks 3
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r = a2-a1
r = 4-1
r = 3
n = 15
an = a1+(n-1).r
a15 = 1+(15-1).3
a15 = 1+14.3
a15 = 1+42
a15 = 43
r: Razão
r=
r = 4 - 1
r =3