Need help: how to solve for t?

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.

所有跟帖： 

• 画图，v（t）跟2相交的t在要求的范围内就是解。 -相对强度- ♂ (0 bytes) () 11/30/2014 postreply 19:08:12

• Any other way that really solve for t with an equation so I can -ZoyaWashington- ♀ (101 bytes) () 11/30/2014 postreply 19:13:54

• 像这类方程，大多都没有解析解的。但可以有数值解，牛顿法就是一种方法，用电脑，很快就能得到3decimal。 -相对强度- ♂ (0 bytes) () 11/30/2014 postreply 19:23:36

• Newton's Method & Linear Approximation -勿来三- ♂ (93 bytes) () 11/30/2014 postreply 19:22:57

• 3.12762994960494 (请自己验算) -NianCaoXi- ♂ (0 bytes) () 11/30/2014 postreply 19:55:21

• No liabilities assumed. -NianCaoXi- ♂ (0 bytes) () 11/30/2014 postreply 20:06:09

• 多谢大家帮忙，那个math problem总算啃明白拉。 -ZoyaWashington- ♀ (0 bytes) () 11/30/2014 postreply 23:16:52