+0  
 
0
36
2
avatar

What is the exact value of x in the exponential equation 25x − 57 = 43 

Guest Dec 6, 2018
 #1
avatar+3213 
+1

\(25^x - 57 = 43\\ 25^x = 100\\ 5^{2x} = 100\\ 2x\log(5) = \log(100) = 2\\ x = \dfrac{1}{\log(5)}\)

Rom  Dec 6, 2018
 #2
avatar+14579 
+2

Another possibility

25^x = 43 + 57

25^x = 100

x log 25 = 2

x = 2/log25    (same thing)

ElectricPavlov  Dec 7, 2018

9 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.