4x-3 pangkat -5 dimana x=3 dan x=-1

Mapel : Matematika
Kelas : IX SMP
Bab : Perpangkatan

Pembahasan :
(4x - 3)¯⁵

Jika x = 3, maka...
(4x - 3)¯⁵
= (4.3 - 3)¯⁵
= (12 - 3)¯⁵
= 9¯⁵
= 1/9⁵
= 1/59.049

Jika x = -1, maka...
(4x - 3)¯⁵
= (4.-1 -3)¯⁵
= (-4 - 3)¯⁵
= (-7)¯⁵
= 1/(-7)⁵
= - 1/16.807

Jika x = 3
[tex]={ \left( 4x-3 \right) }^{ -5 }\\ ={ \left( 4\cdot 3-3 \right) }^{ -5 }\\ =\frac { 1 }{ { \left( { 3 }^{ 2 } \right) }^{ 5 } } \\ =\frac { 1 }{ { 3 }^{ 10 } } [/tex]
Jika x = -1
[tex]={ \left( 4(-1)-3 \right) }^{ -5 }\\ ={ \left( -4-3 \right) }^{ -5 }\\ =\frac { 1 }{ { \left( -7 \right) }^{ 5 } } \\ =-\frac { 1 }{ { 7 }^{ 5 } } [/tex]