Q. f(x) = 21x + x³ ÷ 5 f(5) =

Jawaban:

f(5) = ?

• 21x + x³ ÷ 5
• 21(5) + (5³ ÷ 5)
• (21 × 5) + (5³ ÷ 5)
• 105 + (5³ ÷ 5)
• 105 + ((5 × 5 × 5) ÷ 5)
• 105 + ((25 × 5) ÷ 5)
• 105 + (125 ÷ 5)
• 105 + 25
• 130

• Penyelesaian:

f(x) = 21x + x³ ÷ 5

f(5) = 21(5) + 5³ ÷ 5

f(5) = (21 × 5) + (5 × 5 × 5) ÷ 5

f(5) = 105 + 125 ÷ 5

f(5) = 130

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