Find the values of the parameter k for which the function y = e ^ kx is a solution to the differential equation: y ‘= y.
April 27, 2021 | education
| Let’s find the derivative of our given function: f (x) = (e ^ x) * (x ^ 3).
Using the basic formulas and rules of differentiation:
(x ^ n) ‘= n * x ^ (n-1).
(e ^ x) ‘= e ^ x.
(c) ‘= 0, where c is const.
(c * u) ’= c * u’, where c is const.
(uv) ‘= u’v + uv’.
y = f (g (x)), y ‘= f’u (u) * g’x (x), where u = g (x).
Thus, the derivative of our given function will be as follows:
f (x) ‘= ((e ^ x) * (x ^ 3))’ = (e ^ x) ‘* (x ^ 3) + (e ^ x) * (x ^ 3)’ = (e ^ x) * (x ^ 3) + (e ^ x) * 3 * x ^ 2 = (e ^ x) * (x ^ 3) + (e ^ x) * 3x ^ 2.
Answer: The derivative of our given function will be equal to f (x) ‘= (e ^ x) * (x ^ 3) + (e ^ x) * 3x ^ 2.
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