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OpenStudy (anonymous):
For 0≤t≤10, how many values of t satisfy the equation cos t= -2e^-2t? Do Not find specific values.
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OpenStudy (anonymous):
Graph and see that there are 3.
OpenStudy (anonymous):
Cos(t) cut the x-axis in 3 points between 0 and 10. Can you argue now that - e^{-2t} cuts the Cos(t) in 3 points?
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