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

3744 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

Derive the quadratic equation.


If I have the equation of a curve, how do I find its stationary points?


Using the Trapezium rule with four ordinates (three strips), estimate to 4 significant figures the integral from 1 to 4 of (x^3+12)/4sqrt(x). Calculate the exact value of this integral, comparing it with your estimate. How could the estimate be improved?


A girl saves money over 200 weeks. She saves 5p in Week 1, 7p in Week 2, 9p in Week 3, and so on until Week 200. Her weekly savings form an arithmetic sequence. Find the amount she saves in Week 200. Calculate total savings over the 200 week period.


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