No.15:
3√18 × 2√48: 4√3
= 6√864 : 4√3
= 6√144.6 : 4√3
= 6.12 √6 : 4√3
= 72 √6 : 4√3
= 72√6 /4√3 × √3/√3
= 72√6 ×√3 / 4√3 ×√3
= 72√18 / 4.3
= 72√18 / 12
=6√18
= 6√9.2
= 6.3√2
= 18√2
jawabannya C. 18√2
Keterangan: tanda titik (.) artinya kali (×)
No.16:
(√ m^2/3 n^1 3/4)⁴
= √m^2/3×4. n^1 3/4× 4
= √ m^8/3 . n^7/4×4
= √ m^8/3 . √n^7
= (m^8/3:2). (n^7:2)
=( m^ 8/3 × 1/2) . (n^7 ×1/2)
= m^8/6 . n^7/2
= 6^√m^8 . ²√n^7
No.17:
⁴√16^x+5 = 4^x+3
16 ^x+5/4 = 4^x+3
(4²)^x+5/4 = 4^x+3
4^ x+5/2 = 4^x+3 => bilangan 4
saling dicoret
x+5/2 = x+3
x+5 = 2(x+3)
x+5 = 2x+6
5-6 = 2x-x
-1 = x
jadi jawabannya C
Keterangan:
tanda (^) artinya pangkat
Maaf cuman bisa jawab seadanya, karena saya juga kelas 9 .
Semoga membantu!
Semangat belajar:)
By: Alika
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
No.15:
3√18 × 2√48: 4√3
= 6√864 : 4√3
= 6√144.6 : 4√3
= 6.12 √6 : 4√3
= 72 √6 : 4√3
= 72√6 /4√3 × √3/√3
= 72√6 ×√3 / 4√3 ×√3
= 72√18 / 4.3
= 72√18 / 12
=6√18
= 6√9.2
= 6.3√2
= 18√2
jawabannya C. 18√2
Keterangan: tanda titik (.) artinya kali (×)
No.16:
(√ m^2/3 n^1 3/4)⁴
= √m^2/3×4. n^1 3/4× 4
= √ m^8/3 . n^7/4×4
= √ m^8/3 . √n^7
= (m^8/3:2). (n^7:2)
=( m^ 8/3 × 1/2) . (n^7 ×1/2)
= m^8/6 . n^7/2
= 6^√m^8 . ²√n^7
No.17:
⁴√16^x+5 = 4^x+3
16 ^x+5/4 = 4^x+3
(4²)^x+5/4 = 4^x+3
4^ x+5/2 = 4^x+3 => bilangan 4
saling dicoret
x+5/2 = x+3
x+5 = 2(x+3)
x+5 = 2x+6
5-6 = 2x-x
-1 = x
jadi jawabannya C
Keterangan:
tanda (^) artinya pangkat
Maaf cuman bisa jawab seadanya, karena saya juga kelas 9 .
Semoga membantu!
Semangat belajar:)
By: Alika