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Find dydxdydx, if dy/dx, if x = e3t, y = e^((4t + 5))

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Question

Find `dy/dx`, if x = e3t, y = `e^((4t + 5))`

Sum
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Solution

x = e3t 

Differentiating both sides w.r.t. t, we get

`dx/dt = e^(3t) * (3) = 3 e^(3t)`  

y = `e^(4t + 5)`

Differentiating both sides w.r.t. t, we get

`dy/dt = e^((4t + 5)) xx 4`

`= 4 * e^((4t + 5))`

∴ `dy/dx = ((dy/dt))/((dx/dt))`

= `(4 * e^(4t + 5))/(3* e^(3t))`

`= 4/3 e^(4t + 5 - 3t)`

`= 4/3 e^(t + 5)`

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Chapter 3: Differentiation - EXERCISE 3.5 [Page 97]
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