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[SPAM] [obm-l] ajuda PA



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=20

Ol=E1 amigos!

=20

Preciso de ajuda no seguinte exerc=EDcio:

=20

=20

Nos itens abaixo, Sn indica a soma dos n primeiros termos de uma P. A., =
para
qualquer n E N*

=20

a)    Se Sn=3D 3n=B2 + 4n, por qual n=FAmero a P.A. come=E7a?

b)    SE Sn =3D -2n=B2 - 5n, qual a raz=E3o da P.A.?

c)    Qual o terceiro termo da P.A. do item b?

=20

=20

Muito obrigado

=20

=20

M=E1rio.=20

=20

=20


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<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'>Ol=E1 amigos!<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'>Preciso de ajuda no seguinte =
exerc=EDcio:<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'>Nos itens abaixo, Sn indica a soma dos n primeiros termos de uma =
P. A.,
para qualquer n E N*<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'><o:p>&nbsp;</o:p></span></font></p>

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style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l0 level1 lfo1'><![if !supportLists]><font size=3D2 face=3D"Courier =
New"><span
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size=3D1
face=3D"Times New Roman"><span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;
</span></font></span></span></font><![endif]>Se Sn=3D 3n=B2 + 4n, por =
qual n=FAmero a
P.A. come=E7a?<o:p></o:p></p>

<p class=3DMsoPlainText =
style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l0 level1 lfo1'><![if !supportLists]><font size=3D2 face=3D"Courier =
New"><span
style=3D'font-size:10.0pt'><span style=3D'mso-list:Ignore'>b)<font =
size=3D1
face=3D"Times New Roman"><span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;
</span></font></span></span></font><![endif]>SE Sn =3D -2n=B2 - 5n, qual =
a raz=E3o da
P.A.?<o:p></o:p></p>

<p class=3DMsoPlainText =
style=3D'margin-left:36.0pt;text-indent:-18.0pt;mso-list:
l0 level1 lfo1'><![if !supportLists]><font size=3D2 face=3D"Courier =
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size=3D1
face=3D"Times New Roman"><span style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;
</span></font></span></span></font><![endif]>Qual o terceiro termo da =
P.A. do
item b?<o:p></o:p></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
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<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'>Muito obrigado<o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'><o:p>&nbsp;</o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'>M=E1rio. <o:p></o:p></span></font></p>

<p class=3DMsoPlainText><font size=3D2 face=3D"Courier New"><span =
style=3D'font-size:
10.0pt'><o:p>&nbsp;</o:p></span></font></p>

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