Respuesta:
a.
[tex]5 \sqrt{x+7} = 20[/tex]
[tex]\sqrt{x+7} = \frac{20}{5}[/tex]
[tex]\sqrt{x+7} = 4[/tex]
[tex]x + 7 = 4^{2}[/tex]
[tex]x + 7 = 16[/tex]
[tex]x= 16 - 7[/tex]
[tex]x = 9[/tex]
b.
[tex]\sqrt[3]{3x+1}= -2[/tex]
[tex]3x+1= (-2)^{3}[/tex]
[tex]3x+1 = -8[/tex]
[tex]3x =-8-1[/tex]
[tex]x =\frac{-9}{3}[/tex]
[tex]x = -3[/tex]
c.
[tex](\sqrt{3x+1} ):2+5 = 9[/tex]
[tex](\sqrt{3x+1} ):2 = 9 - 5[/tex]
[tex](\sqrt{3x+1} ):2= 4[/tex]
[tex]\sqrt{3x+1} = 4 .2[/tex]
[tex]\sqrt{3x+1} = 8[/tex]
[tex]3x + 1=8^{2}[/tex]
[tex]3x=64-1[/tex]
[tex]x = \frac{63}{3}[/tex]
[tex]x = 21[/tex]
d.
[tex]\sqrt[4]{4x+41} +2 = 5[/tex]
[tex]\sqrt[4]{4x+41}=5 - 2[/tex]
[tex]\sqrt[4]{4x+41} =3[/tex]
[tex]4x+41=3^{4}[/tex]
[tex]4x = 81-41[/tex]
[tex]x =\frac{40}{4}[/tex]
[tex]x = 10[/tex]
e.
[tex]10=3\sqrt[3]{x+3} +4[/tex]
[tex]10-4=3\sqrt[3]{x+3}[/tex]
[tex]\frac{6}{3} =\sqrt[3]{x+3}[/tex]
[tex]2^{3} =x+3[/tex]
[tex]8-3=x[/tex]
[tex]5=x[/tex]
f.
[tex]9 - 2\sqrt{x+1} =3[/tex]
[tex]9-3=2\sqrt{x+1}[/tex]
[tex]\frac{6}{2} =\sqrt{x+1}[/tex]
[tex](3 )^{2} = x+1[/tex]
[tex]9 -1=x[/tex]
[tex]8=x[/tex]
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Respuesta:
a.
[tex]5 \sqrt{x+7} = 20[/tex]
[tex]\sqrt{x+7} = \frac{20}{5}[/tex]
[tex]\sqrt{x+7} = 4[/tex]
[tex]x + 7 = 4^{2}[/tex]
[tex]x + 7 = 16[/tex]
[tex]x= 16 - 7[/tex]
[tex]x = 9[/tex]
b.
[tex]\sqrt[3]{3x+1}= -2[/tex]
[tex]3x+1= (-2)^{3}[/tex]
[tex]3x+1 = -8[/tex]
[tex]3x =-8-1[/tex]
[tex]x =\frac{-9}{3}[/tex]
[tex]x = -3[/tex]
c.
[tex](\sqrt{3x+1} ):2+5 = 9[/tex]
[tex](\sqrt{3x+1} ):2 = 9 - 5[/tex]
[tex](\sqrt{3x+1} ):2= 4[/tex]
[tex]\sqrt{3x+1} = 4 .2[/tex]
[tex]\sqrt{3x+1} = 8[/tex]
[tex]3x + 1=8^{2}[/tex]
[tex]3x=64-1[/tex]
[tex]x = \frac{63}{3}[/tex]
[tex]x = 21[/tex]
d.
[tex]\sqrt[4]{4x+41} +2 = 5[/tex]
[tex]\sqrt[4]{4x+41}=5 - 2[/tex]
[tex]\sqrt[4]{4x+41} =3[/tex]
[tex]4x+41=3^{4}[/tex]
[tex]4x = 81-41[/tex]
[tex]x =\frac{40}{4}[/tex]
[tex]x = 10[/tex]
e.
[tex]10=3\sqrt[3]{x+3} +4[/tex]
[tex]10-4=3\sqrt[3]{x+3}[/tex]
[tex]\frac{6}{3} =\sqrt[3]{x+3}[/tex]
[tex]2^{3} =x+3[/tex]
[tex]8-3=x[/tex]
[tex]5=x[/tex]
f.
[tex]9 - 2\sqrt{x+1} =3[/tex]
[tex]9-3=2\sqrt{x+1}[/tex]
[tex]\frac{6}{2} =\sqrt{x+1}[/tex]
[tex](3 )^{2} = x+1[/tex]
[tex]9 -1=x[/tex]
[tex]8=x[/tex]