Question

Q.✨
• f(x) = 20x² + 10x - 15⁵
• f(5) =......
​

Answer 1

Jawaban:

f(x) = 20x² + 10x - 15⁵

f(5) = -758.825

Penyelesaian :

f(x) = 20x² + 10x - 15⁵

f(5) = 20(5²) + 10(5) - 15⁵

f(5) = 20(5 × 5) + (10 × 5) - (15 × 15 × 15 × 15 × 15)

f(5) = 20(25) + 50 - 759.375

f(5) = (20 × 25) + 50 - 759.375

f(5) = 500 + 50 - 759.375

f(5) = 550 - 759.375

f(5) = -758.825

Answer 2

f(x) = 20x² + 10x - 15⁵

f(5)

==============================

= 20x² + 10x - 15⁵

= 20(5)² + 10(5) - ( 15 × 15 × 15 × 15 × 15 )

= 100² + 50 - ( 225 × 15 × 15 × 15 )

= 10.000 + 50 - ( 3.375 × 15 × 15 )

= 10.050 - ( 50.625 × 15 )

= 10.050 - 759.375

= -749.325