Jawaban:
1). 5
2). 23
3). 5
5). 500,5cm2
Penjelasan dengan langkah-langkah:
Cara penyelesaian serta penjelasan
ada pada foto di atas
1) barisan bilangan asli :
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ..., n
U1 = 1
U2 = 2
U3 = 3
Un = n
2) 23 – 21 × 0
= 23 – 0
= 23
3) 12 ÷ 2 – 1
= 12 – 1
2
= 6 – 1
= 5
5) d1 = 42 → r1 = 21 cm
d2 = 42 – 28 = 14
r2 = 7 cm
Luas diarsir = ⅜π(r1² – r2²)
= ⅜ × 22/7 × (21² – 7²)
= 33/28 × (441 – 49)
= 33/28 × 392
= 33 × 392/28
= 33 × 14
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Jawaban:
1). 5
2). 23
3). 5
5). 500,5cm2
Penjelasan dengan langkah-langkah:
Cara penyelesaian serta penjelasan
ada pada foto di atas
Penjelasan dengan langkah-langkah:
1) barisan bilangan asli :
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ..., n
U1 = 1
U2 = 2
U3 = 3
Un = n
2) 23 – 21 × 0
= 23 – 0
= 23
3) 12 ÷ 2 – 1
= 12 – 1
2
= 6 – 1
= 5
5) d1 = 42 → r1 = 21 cm
d2 = 42 – 28 = 14
r2 = 7 cm
Luas diarsir = ⅜π(r1² – r2²)
= ⅜ × 22/7 × (21² – 7²)
= 33/28 × (441 – 49)
= 33/28 × 392
= 33 × 392/28
= 33 × 14
= 462 cm²