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Verified answer
1. Jumlah Bilangan kelipatan 3 antara 100 dan 200Cari batas bawah : 102 / 3 = 34
Cari batas atas : 198 / 3 = 66
Jadi ada 66 - 34 + 1 = 33 bilangan
Jika ditanya jumlah semua bilangannya : (deret aritmatika)
Sn = n/2 (a + Un)
S33 = 33/2 (102 + 198)
S33 = 33/2 × 300
S33 = 4950
2.P dan Q saling berpenyiku
P + Q = 90
4x - 13 + 3x + 5 = 90
7x - 8 = 90
7x = 98
x = 14
Maka besar <P
= 4x - 13
= 4.14 - 13
= 56 - 13
= 43°
Besar <Q
= 3x + 5
= 3.14 + 5
= 42 + 5
= 47°
smg membantu