Answers

平均の速さはyの増加量/ xの増加量です
xがt→t+2に増加すると、yは5t^2→5(t+2)^2 増加しますね
よって、{5(t+2)-5t^2}/{(t+2)-t}が60になればいいですね

Post A Comment
Were you able to resolve your confusion?

Users viewing this question
are also looking at these questions 😉