We need to find a if 729^a - 57 = 0

729^a - 57 = 0

=> 729^a = 57

As the base cannot be equated we can use logarithms

log (729^a) = log 57

use the property log a^b = b*log a

=> a*log 729 = log 57

=> a = log 57 / log 729

**The value of a = log 57/log 729**

Posted on

## We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

- 30,000+ book summaries
- 20% study tools discount
- Ad-free content
- PDF downloads
- 300,000+ answers
- 5-star customer support

Already a member? Log in here.

Are you a teacher? Sign up now