Tentukan nilai X, jika (2x + 1)+(2x + 3)+…..+(2x + 50)=4275
tolong dibantu ya….
Jawaban Terkonfirmasi
A = 2x + 1
b = 1
U50 = 2x + 50
S50 = 4275
Sn = n/2(a+Un)
S50 = 50/2 (2x+1+2x+50)
4275 = 25 (4x+51)
4275/25 = 4x + 51
171 = 4x + 51
171 – 51 = 4x
120 = 4x
120/4 = x
30 = x