The variables x and y are related by y = 5^x. How do I find the value of x when y is set to 15?

15 = 5^x, we can easily solve this equation by using logs on either side which will give us: log15 = x log 5. Then by solving this for x, we get the result of 1.68 to two decimal places.

Answered by Andrea B. Maths tutor

2773 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Find the tangent and normal to the curve y=(4-x)(x+2) at the point (2, 8)


Differentiate y=4x^2+3x+9


Prove the property: log_a(x) + log_a(y) = log_a(xy).


Show that (sec(x))^2 /(sec(x)+1)(sec(x)-1) can be written as (cosec(x))^2.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences