Question

Quiz

Dik:
f(x) = 2x² - 4x
g(x) = x - 2

tentukan:
1. (f + g)(x)
2. (f - g)(x)

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Answer 1

Diketahui:

• f(x) = 2x² - 4x
• g(x) = x - 2

Ditanyakan:

• (f + g) (x)
• (f - g) (x)

Penyelesaian:

• (f + g) (x)

(f + g) (x) = f(x) + g(x)

= (2x² - 4x) + (x - 2 )

= 2x² - 4x + x - 2

= 2x² - 3x - 2

• (f - g) (x)

(f - g) (x) = f(x) - g(x)

= (2x² - 4x) - (x - 2)

= 2x² - 4x - x + 2

= 2x² - 5x + 2