Jawaban:
A. x² - 10x + 22
Penjelasan dengan langkah-langkah:
f'(x) = 5 - √x + 3
y = 5 - √x + 3
√x + 3 = 5 - y
(√x + 3)² = (5 - y)²
x + 3 = 25 - 10y + y²
x = y² - 10y + 25 - 3
x = y² - 10y + 22
maka
f(x) = x² - 10x + 22
INVERS FUNGSI
y = f(x) ⇢ x = f⁻¹ (y)
(a - b)² = a² - 2ab + b²
(√n)² = n
f⁻¹ (x) = y = 5 - √(x + 3)
y - 5 = - √(x + 3)
(y - 5)² = (-√(x + 3))²
y² - 10y + 25 = x + 3
x = f⁻¹ (y) = y² - 10y + 25 - 3
f⁻¹ (y) = y² - 10y + 22
Fungsi f(x) = x² - 10x + 22
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Verified answer
Jawaban:
A. x² - 10x + 22
Penjelasan dengan langkah-langkah:
f'(x) = 5 - √x + 3
y = 5 - √x + 3
√x + 3 = 5 - y
(√x + 3)² = (5 - y)²
x + 3 = 25 - 10y + y²
x = y² - 10y + 25 - 3
x = y² - 10y + 22
maka
f(x) = x² - 10x + 22
INVERS FUNGSI
y = f(x) ⇢ x = f⁻¹ (y)
(a - b)² = a² - 2ab + b²
(√n)² = n
f⁻¹ (x) = y = 5 - √(x + 3)
y - 5 = - √(x + 3)
(y - 5)² = (-√(x + 3))²
y² - 10y + 25 = x + 3
x = f⁻¹ (y) = y² - 10y + 25 - 3
f⁻¹ (y) = y² - 10y + 22
Fungsi f(x) = x² - 10x + 22