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kalimat mtk =
1 + 2 + 3 +....+84
diket:
a=1
b=U2-U1=2-1=1
n=84
Un=84
Sn=n/2 (a + Un)
S84 = 84/2 (1 + 84)
=42 (85)→3570
Lupa 3 halaman genap
selisih=3570 - 3498 =72
bil genap=
n , n+2 , n+4
jadi,
n+n+2+n+4 =72
3n+6 = 72
3n = 72 -6
3n = 66
n = 66/3→22
jadi bil yg dilupakan
n , n+2 , n+4
22 , 22+2 , 22+4
22 , 24 , 26
hal terbesar dari 3 hal itu adlh 26
jadi kan jwbn ter-brainly mu yh
thks