s(s + 1) = s^2 + 6 - 2s
s^2+s=s^2+6-2s
s= 6-2s
2s +s =6
3s=6
s=2
We support schools, educators, and learners through high-quality science education, educational content design, and innovative teaching approaches. ”Physics keeps life going-物理 依据 生命
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου