Question

Tolong yaa nomor 2 ajhhh
Pake cara yaaa:(

Answer 1

Verified answer

2.-1+2-3+4-5+6-7+8-...+50.
-1+2 = 1
-3 + 4 = 1

dapat dilihat bahwa 2 bil berurutan hasilnya adalah 1
maka Sn = 50/2 (1) = 25


=> B

Answer 2

2))

-1 + 2 - 3 + 4 - 5 + 6 - 7 + 8 - ... + 50
=> -1 + 2 = 1
=> -3 + 4 = 1

Sn = 50 : 2 (1) = 25

-1 + 2 - 3 + 4 - 5 + 6 - 7 + 8 - 25 + 50
..................................................... ˙˙˙˙˙˙˙˙˙˙ ..........

Jawabannya B