Jawaban:

Penyelesaian 1 :

Dik : Sebuah balok memiliki panjang 5 cm, lebar 3 cm, dan tinggi 11 cm.

Dit : Berapakah luas permukaan balok ?

Dijawab :

Lp = 2 × (pl + pt + lt)

Lp = 2 × ((5 × 3) + (5 × 11) + (3 × 11))

Lp = 2 × (15 + 55 + 33)

Lp = 2 × (70 + 33)

Lp = 2 × 103

Lp = 206 cm³

Penyelesaian 2 :

f(x) = 10x × x! + 3x²

f(9) = 10(9) × 9! + 3(9)²

f(9) = (10 × 9) × 9! + 3(9)²

f(9) = 90 × (9 × 8 × 7 × 6 × 5 × 4 × 3 × 2) + 3(9)²

f(9) = 90 × 362.880 + 3(9 × 9)

f(9) = 90 × 362.880 + (3 × 81)

f(9) = 90 × 362.880 + 243

f(9) = 32.659.200 + 243

f(9) = 32.659.443

Penyelesaian 3 :

2.810 × 2.010

= 5.648.100

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