What is the derivative of z=(te^6t + e^7t)^5?

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In summary, the conversation discusses finding the derivative of a given function using different rules, including the chain rule, product rule, power rule, and exponential rule. The first attempt was incorrect and the second attempt was deemed easier and more aesthetically pleasing.
  • #1
neutron star
78
1

Homework Statement


Find the derivative of the given function
z=(te^6t + e^7t)^5


Homework Equations





The Attempt at a Solution


5(te^6t + e^7t)^4
 
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  • #2
That's wrong! Chain rule! Then product rule!
 
  • #3
write
z=(te^6t + e^7t)^5=(t+e^t)^5*e^30t
 
Last edited:
  • #4
lurflurf said:
write
z=(te^6t + e^7t)^5=(t+e^t)e^30t

You mean z=(t+e^t)^5*e^30t. And I don't see how that makes it easier. The original form for z is easy enough to differentiate if you use the rules.
 
  • #5
They are both easy, but I thought the use of slightly fewer rules was an improvement.
(te^6t + e^7t)^5
power rule with chain rule
sum rule
product rule
derivative of an exponential with chain rule x2
derivative of the variable
total=9 rules (3 chain)
vs
(t+e^t)^5*e^30t
product rule
derivative of an exponential with chain rule
power rule with chain rule
sum rule
derivative of the variable
derivative of an exponential
total=8 rules (2 chain)
Though most important
(t+e^t)^5*e^30t is more aesthetically pleasing to my eye.
 
  • #6
Well, now it's up to neutron star to pull off either one.
 

Related to What is the derivative of z=(te^6t + e^7t)^5?

What is the derivative of e^x?

The derivative of e^x is simply e^x itself. This can be derived using the limit definition of a derivative or by recognizing that e^x is its own derivative.

How do you find the derivative of e^u?

To find the derivative of e^u, use the chain rule. This involves taking the derivative of the outer function (e^x) and multiplying it by the derivative of the inner function (u). The result will be e^u times u'.

Can the derivative of e be negative?

No, the derivative of e is always positive. This is because e is a constant value and its derivative is simply itself.

What is the derivative of ln(x)?

The derivative of ln(x) is simply 1/x. This can be derived using the properties of logarithms or by using the inverse function rule.

How do you find the derivative of e^x^2?

To find the derivative of e^x^2, use the chain rule twice. First, take the derivative of the outer function (e^u) where u = x^2. This will result in e^x^2 times 2x. Then, take the derivative of the inner function (x^2) which is 2x. Multiply these together to get the final result of 2xe^x^2.

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