1.jika p=-4 ,q=5,dan r=-2 ,nilai dari 3p²+q-r adalah... 2. jika a=⅓ ,b=¼, c=1/5, nilai a+bc=.... 3. bentuk sederhana 25/√5 adalah.... 4. bentuk sederhana dari 8/3+√5 adalah... 5. bentuk persen dari 5/12 adalah.... 6. nilai dari log 2+log 4+log 125 adalah.... 7. nilai dari ³log 18+³log 1/9-³log 6 adalah..... 8. nilai x yang memenuhi persamaan 3 pangkat 5x-2=9x+2 adalah.... 9. nilai dari (-20)-(-2)+4 adalah....
3p² + q - r
= 3(-4)² + 5 - (-2)
= 3(16) + 5 + 2
= 48+7
= 55
jawaban soal nomer 2
a + bc = 1/3 + ( 1/4 x 1/5)
= 1/3 + ( 1/20)
= (20+3)/60
= 23/20
jawaban soal nomer 3
25/√5 = 25/√5 x √5/√5
= 25√5/5
= 5√5
jawaban soal nomer 4
jawaban soal nomer 5
5/12 = 5/12 x 100%
= 500/12 %
= 41,67%
jawaban soal nomer 6
log 2+log 4+log 125
= log (2 x 4 x 125)
= log 1000
= log 10³
= 3 log 10
= 3(1)
= 3
jawaban soal nomer 7
³log 18+³log 1/9-³log 6
= ³log ( 18 x 1/9 : 6)
= ³ log ( 2 : 6)
= ³ log 1/3
= ³ log 3⁻¹
= -1 ³log 3
= -1(1)
= -1
jawaban soal nomer 8
3 ⁵ˣ⁻² = 9 ˣ ⁺ ²
3 ⁵ˣ⁻² = 3²⁽ˣ⁺²⁾
3 ⁵ˣ⁻² = 3²ˣ⁺⁴
5x - 2 = 2x + 4
5x -2x = 4 + 2
3x =6
x = 6/3
x = 2
jawaban soal nomer 9
-20 -(-2) + 4
= -20 + 2+4
= - 16
3p² + q - r
= 3(-4)² + 5 - (-2)
= 3(16) + 5 + 2
= 48+7
= 55
nomer 2
a + bc = 1/3 + ( 1/4 x 1/5)
= 1/3 + ( 1/20)
= (20+3)/60
= 23/20
nomer 3
25/√5 = 25/√5 x √5/√5
= 25√5/5
= 5√5
nomer 5
5/12 = 5/12 x 100%
= 500/12 %
= 41,67%
nomer 7
³log 18+³log 1/9-³log 6
= ³log ( 18 x 1/9 : 6)
= ³ log ( 2 : 6)
= ³ log 1/3
= ³ log 3⁻¹
= -1 ³log 3
= -1(1)
= -1
nomer 9
-20 -(-2) + 4
= -20 + 2+4
= - 16