Materi Baris dan Deret
Kelas IX
a = 105
b = 5
Un = 295
Un = a + (n-1)b
295 = 105 + (n-1)5
5n - 5 = 190
5n = 195
n = 39
Sn = n/2 (a+Un)
S39 = 39/2 (105+295)
S39 = 39/2 (400)
S39 = 39 (200)
S39 = 7800
Mohon maaf apabila ada kesalahan
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Materi Baris dan Deret
Kelas IX
a = 105
b = 5
Un = 295
Un = a + (n-1)b
295 = 105 + (n-1)5
5n - 5 = 190
5n = 195
n = 39
Sn = n/2 (a+Un)
S39 = 39/2 (105+295)
S39 = 39/2 (400)
S39 = 39 (200)
S39 = 7800
Mohon maaf apabila ada kesalahan