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launegomesramos1
@launegomesramos1
July 2022
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A razao da PA em que a eigual a4=17e a iqual a11=45é:
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Helvio
Verified answer
A4 = 17
a11 = 45
Encontrar a razão:
Razão da PA ( r )
an=
ak + ( n - k ) *r
17= 45 + ( 4 - 11 ) * r
17= 45 - 7 * r
17- 45 = -7 * r
-28/ -7 = r
r= 4
Razão = 4
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launegomesramos1
obrigado querido
Helvio
De nada.
cristianaplima
Verified answer
A4=17
a11=45
a11=a4+7R ( 11-4= 7)
45=17+7R
45-17=7R
28=7R
R=28/7
R= 4
PA( 17,21,25,29,33,37,41,45)
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Helvio
Só para saber = PA ( 5; 9 ; 13 ; 17 ; 21 ; .... ; 45 ).
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Lista de comentários
Verified answer
A4 = 17a11 = 45
Encontrar a razão:
Razão da PA ( r )an=
ak + ( n - k ) *r
17= 45 + ( 4 - 11 ) * r
17= 45 - 7 * r
17- 45 = -7 * r
-28/ -7 = r
r= 4
Razão = 4
Verified answer
A4=17a11=45
a11=a4+7R ( 11-4= 7)
45=17+7R
45-17=7R
28=7R
R=28/7
R= 4
PA( 17,21,25,29,33,37,41,45)