Jawabanmu

2014-08-25T21:22:22+07:00
=1/2 × 95 × (142 + 48)
=1/2 × 95 × 190
= 1/2 × 190 × 95
= 95 × 95
=9025
2014-08-25T21:36:29+07:00
N(n+1)/2
n : 94
n+1 : 95
n/2 : 47
= 95 x47
= 4465