Question

Tmn2...mohon bantuanya ya....
tntukan hasil dr
y = x + 13 + x + 23 + x + 33 + x 43 +.............x+1003
trm ksh sblmnya......

Answer 1

Y=x+13+x+23+x+33+...+x+1003
 = 100x + (13+23+33+...+1003)
 = 100x + (100/2 (2.13+(100-1)10)
 = 100x + (50(26+99.10)
 = 100x + (50(26+990)
 = 100x + (50(1016)
 = 100x + 50800

Answer 2

Un = a + (n-1)b
1003 = 13 + (n-1) x 10
1003 = 13 + 10n - 10
10n = 1000
n = 100
jadi x nya ada 100. Lalu cari Sn nya.

Sn = 100/2 (13+1003)
= 50 (1016)
= 50800
jadi, y = 100x + 50800 (kalo gak salah itung)