« Penyelesaian Soal »

• Diketahui

rumus fungsi f(x) = 7x + x × 5x ÷ x

• Ditanya

f(2) = ..

f(3) = ..

f(4) = ..

f(5) = ..

f(6) = ..

f(7) = ..

f(8) = ..

f(9) = ..

f(10) = ..

• Dijawab

• Hasil dari f(2)

• f(2) = 7(2) + 2 × 5(2) ÷ 2
• f(2) = ( 7 × 2 ) + 2 × ( 5 × 2 ) ÷ 2
• f(2) = 14 + ( 2 × 10 ) ÷ 2
• f(2) = 14 + ( 20 ÷ 2 )
• f(2) = 14 + 10
• f(2) = 24

• Hasil dari f(3)

• f(3) = 7(3) + 3 × 5(3) ÷ 3
• f(3) = ( 7 × 3 ) + 3 × ( 5 × 3 ) ÷ 3
• f(3) = 21 + ( 3 × 15) ÷ 3
• f(3) = 21 + ( 45 ÷ 3 )
• f(3) = 21 + 15
• f(3) = 36

• Hasil dari f(4)

• f(4) = 7(4) + 4 × 5(4) ÷ 4
• f(4) = ( 7 × 4 ) + 4 × ( 5 × 4 ) ÷ 4
• f(4) = 28 + ( 4 × 20 ) ÷ 4
• f(4) = 28 + ( 80 ÷ 4)
• f(4) = 28 + 20
• f(4) = 48

• Hasil dari f(5)

• f(5) = 7(5) + 5 × 5(5) ÷ 5
• f(5) = ( 7 × 5 ) + 5 × ( 5 × 5 ) ÷ 5
• f(5) = 35 + ( 5 × 25 ) ÷ 5
• f(5) = 35 + ( 125 ÷ 5 )
• f(5) = 35 + 25
• f(5) = 60

• Hasil dari f(6)

• f(6) = 7(6) + 6 × 5(6) ÷ 6
• f(6) = ( 7 × 6 ) + 6 × ( 5 × 6 ) ÷ 6
• f(6) = ( 42 ) + ( 6 × 30 ) ÷ 6
• f(6) = 42 + ( 180 ÷ 6 )
• f(6) = 42 + 30
• f(6) = 72

• Hasil dari f(7)

• f(7) = 7(7) + 7 × 5(7) ÷ 7
• f(7) = ( 7 × 7 ) + 7 × ( 5 × 7 ) ÷ 7
• f(7) = 49 + ( 7 × 35 ) ÷ 7
• f(7) = 49 + ( 245 ÷ 7 )
• f(7) = 49 + 35
• f(7) = 84

• Hasil dari f(8)

• f(8) = 7(8) + 8 × 5(8) ÷ 8
• f(8) = ( 7 × 8 ) + 8 × ( 5 × 8 ) ÷ 8
• f(8) = 56 + ( 8 × 40 ) ÷ 8
• f(8) = 56 + ( 320 ÷ 8 )
• f(8) = 56 + 40
• f(8) = 96

• Hasil dari f(9)

• f(9) = 7(9) + 9 × 5(9) ÷ 9
• f(9) = ( 7 × 9 ) + 9 × ( 5 × 9 ) ÷ 9
• f(9) = 63 + ( 9 × 45 ) ÷ 9
• f(9) = 63 + ( 405 ÷ 9 )
• f(9) = 63 + 45
• f(9) = 108

• Hasil dari f(10)

• f(10) = 7(10) + 10 × 5(10) ÷ 10
• f(10) = ( 7 × 10 ) + 10 × ( 5 × 10 ) ÷ 10
• f(10) = 70 + ( 10 × 50 ) ÷ 10
• f(10) = 70 + ( 500 ÷ 10 )
• f(10) = 70 + 50
• f(10) = 120

Kesimpulan

Hasil dari :

• f(2) = 24
• f(3) = 36
• f(4) = 48
• f(5) = 60
• f(6) = 72
• f(7) = 84
• f(8) = 96
• f(9) = 108
• f(10) = 120

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