1+3+5+7+9+...+75 hasil penjumlahan disamping adalah.... Question from @alviannoval

November 2018 2 17 Report

1+3+5+7+9+...+75 hasil penjumlahan disamping adalah

putrimadhavia Un=a+(n-1)b
75=1+(n-1)2
75=1+2n-2
2n=76
n=38

jumlah
sn=n/2(2a+(n-1)b)
sn=38/2(2.1+(38-1)2
sn=19(76)
sn=1444

2 votes Thanks 2

Fathir18 Jumlah sn=n/2(2a+(n-1)b) sn=38/2(2.1+(38-1)2 sn=19(76) sn=1444

1 votes Thanks 2

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