Need help on graphing complex exponential funtion

[jo_nsyc]

Greeting to all the users and Moderators of this forum.
i am a newbie on this forum.
I have some problems on extending the (wave)length of the trough in the graph of this complex exponential function.
The equation that I am doing is this:

T = 317.25 + 105*(e^(-1.4*t)-e^(-1*t))
where:
T is the temperature and
t is time in seconds
e is the base of the natural logarithm

I already spend several days on how to properly do it but i was not able to find the right strategy.

Could somebody help me or give me some hints/advice on how to properly do this.
I am begging for your help, please.

Thanks in advance.

[RonPurewal]

hi -- sorry, but this forum is strictly for problems related to the GMAT; this one certainly doesn't look like a GMAT problem.

if this problem actually comes from a GMAT-related resource (which would be a giant surprise to me), then please give the appropriate citation and post the problem in the proper folder. we will kill this thread within one week.
thanks.