Q

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f(x) = x² × 2x + x!!
f(7) =
_____________
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Q

Jwb :

f(x) = x² × 2x + x!!

f(7) = 7² × 2(7) + 7!!

f(7) = (7 × 7) × 2(7) + 7!!

f(7) = 49 × 2(7) + 7!!

f(7) = 49 × (2 × 7) + 7!!

f(7) = 49 × 14 + 7!!

f(7) = 49 × 14 + 7 × 5 × 3 × 1

f(7) = 49 × 14 + 35 × 3 × 1

f(7) = 49 × 14 + 105 × 1

f(7) = 49 × 14 + 105

f(7) = 686 + 105

f(7) = 791

...

Jawaban:

f(x) = x² × 2x + x!!

f(7) = 7² × 2(7) + 7!!

f(7) = (7 × 7) × (2 × 7) + (7 × 5 × 3 × 1)

f(7) = 49 × 14 + 105

f(7) = 686 + 105

f(7) = 791