Question

Q.

f(x) = x!! + 7x² - 20²
f(12) = ..



Nt : Met pagi atau met malem ? T-T​

Answer 1

f(x) = x!! + 7x² - 20²

f(12) = 12!! + 7(12)² - 20²

f(12) = (12 × 10) × 8 × 6 × 4 × 2) + 7(12)² - 20²

f(12) = (120 × 8) × 6 × 4 × 2) + 7(12)² - 20²

f(12) = (960 × 6) × 4 × 2) + 7(12)² - 20²

f(12) = (5.760 × 4) × 2) + 7(12)² - 20²

f(12) = (23.040 × 2) + 7(12)² - 20²

f(12) = 46.080 + 7(12)² - 20²

f(12) = 46.080 + 7(12 × 12) - 20²

f(12) = 46.080 + 7(144) - 20²

f(12) = 46.080 + (7 × 144) - 20²

f(12) = 46.080 + 1.008 - 20²

f(12) = 46.080 + 1.008 - (20 × 20)

f(12) = (46.080 + 1.008) - 400

f(12) = 47.088 - 400

f(12) = 46.688

Kesimpulan hasil dari f(12) adalah : 46.688

Answer 2

F( x ) = x!! + 7x² - 20²
f( 12 ) = ....??

MAKA,

f( x ) = x!! + 7x² – 20²
f( 12 ) = 12!! + 7( 12 )² – 20²
f( 12 ) = ( 12 × 10 ) × 8 × 6 × 4 × 2 ) + 7( 12 )² – 20²
f( 12 ) = ( 120 × 8 ) × 6 × 4 × 2 ) + 7( 12 )² – 20²
f( 12 ) = ( 960 × 6 ) × 4 × 2 ) + 7( 12 )² – 20²
f( 12 ) = ( 5.760 × 4 ) × 2 ) + 7( 12 )² – 20²
f( 12 ) = ( 23.040 × 2 ) + 7( 12 )² – 20²
f( 12 ) = 46.080 + 7( 12 )² – 20²
f( 12 ) = 46.080 + 7( 12 × 12 ) – 20²
f( 12 ) = 46.080 + 7( 144 ) – 20²
f( 12 ) = 46.080 + ( 7 × 144 ) – 20²
f( 12 ) = 46.080 + 1.008 – 20²
f( 12 ) = 46.080 + 1.008 – ( 20 × 20 )
f( 12 ) = ( 46.080 + 1.008 ) – 400
f( 12 ) = 47.088 – 400
f( 12 ) = 46.688

Jadi, jawabannya adalah 46.688

f( x ) = x!! + 7x² - 20²
f( 12 ) = 46.688


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Answer by Tee Kay
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