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Verified answer
Materi : Deret AritmatikaKelas : IX SMP
b = U2-U1 = 2-1 =1
S30 = 30/2(2(1) + 29(1))
=> 15 (2 + 29)
=> 15 (31)
=> 465
Verified answer
MatematikaBarisan dan deret IX SMP
Pembahasan :
1 + 2 + 3 + ... + 30
= 30/2(1 + 30)
= 15(31)
= 465