Un=n(n+1)
U25=25(25+1)
=25(26)
=650
Jawab: 2 - 6 - 12 - 20 - 30 - 42 - 56 - 72 - 90 -110 - 132 - 156 - 182 - 210 - 240 - 272 - 306 - 342 - 380 - 420 - 462 - 506 - 552 - 600 - 650.Mohon maaf jika ada kesalahan..
" Life is not a problem to be solved but a reality to be experienced! "
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Un=n(n+1)
U25=25(25+1)
=25(26)
=650
Jawab: 2 - 6 - 12 - 20 - 30 - 42 - 56 - 72 - 90 -110 - 132 - 156 - 182 - 210 - 240 - 272 - 306 - 342 - 380 - 420 - 462 - 506 - 552 - 600 - 650.
Mohon maaf jika ada kesalahan..