Rate of growth of bacteria is proportional to the number of bacteria present at time. If x is the number of bacteria present at any instant t, then which one of the following is correct? (Let the proportional constant equal to 2)

  1. None of these

Answer (Detailed Solution Below)

Option 3 :
Free
NDA 01/2025: English Subject Test
30 Qs. 120 Marks 30 Mins

Detailed Solution

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Concept:

Variable Separable Form:

If it is possible to write a differential equation in the form of f(x) dx = g(y) dy where, f(x) is a function of x and g(y) is a function of y, then we say that the variables are separable.

This kind of differential equations can be solved by integrating both sides. The solution is given by

Calculation:

        ---(Given)

As it is given that, proportional constant equal to 2

Now, by integrating both the sides we get

Now, raising both the side to the power of e, we get

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