100 First Words for Little Geniuses (2)

100 First Words for Little Geniuses (2)

Matematika jika f (x) = x+2, g(x) = x²-1, dan (fog) (x) = 5, maka nilai x adalah ?​

jika f (x) = x+2, g(x) = x²-1, dan (fog) (x) = 5, maka nilai x adalah ?​

Jawaban:

x1 = 2

x2 = -2

Penjelasan dengan langkah-langkah:

(fog)(x) = 5

(x² - 1) + 2 = 5

x² - 1 + 2 = 5

x² + 1 = 5

x² = 5 - 1

x² = 4

x = ±2

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