Solve 4log₂(2)+log₂(x)=3

First, we should look at the laws of logarithms.logax+logay=logaxylogax-logay=loga(x/y)klogax=logaxkWe can see that laws 1 and 3 might be helpful, so we simplify our equation.log224 +log2x=3log224x=3log216x=3Next, we just have to rearrange for x. The inverse of a logarithm is an exponential, so put each side of the equation as a power of 2 (as this is the base of the logarithm). This allows us to remove the logarithm and exponential from one side and we just have to divide by 16 after this.2log16x=2316x=8x=1/2

Answered by Maths tutor

3699 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Use the substitution u=3+(x+4)^1/2 to find the integral of 1/(3+(x+4)^1/2) dx between 0 and 5.


Using answer to previous question state the coordinates of the minimum


When you are working out dy/dx = 0, why do you do this and what does it mean?


Differentiate y = xe^(2x).


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning