Need help: how to solve for t?

来源: 于 2014-11-30 19:01:30 [旧帖] [给我悄悄话] 本文已被阅读：次

Hey, anyone know how to solve this problem:

V(t)=  -2 + (t2+3t)6/5 –t3  .

Find all values of t in the interval 2<t<4, for which V(t)=2.