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its answers are ABD but i want to know how A can be the answer?

its answers are ABD but i want to know how A can be the answer?

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1 Answers

Aditya Gupta
2081 Points
4 years ago
clearly at t= 1/b, the displacement x= a/b*(1 – e^-1)= a/b*(1 – 1/e)
so A is wrong.
but option C is correct.
because v= dx/dt= ae^(-bt) is always greater than zero.
so x(max)= x(t=infinity)= a/b
so clearly the max value of x is a/b and so x cant exceed this value
kindly approve :)

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