Solve the equation 7^(x+1) = 3^(x+2)

1st we will log both sides of the equation7(x+1) = 3(x+2) becomes log7(x+1) = log3(x+2)NEXT we will use the power law which is loga (x)k=k loga (x)This turns log7(x+1) = log3(x+2)to (x+1) log7 = (x+2)log3NEXT we will multiply out the bracketsxlog7 + log7 = xlog3 + 2log3NEXT we will collect x terms on left and 'number' terms on rightxlog7 - xlog3 = 2log3 - log7NEXT we will factorisex(log7 - log3) = 2log3 - log7NEXT isolate xx = (2log3 - log7)/(log7 - log3) = 0.2966

AE
Answered by Anwulika E. Maths tutor

6126 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

An arithmetic progression has a tenth term (a10) = 11.1 and a fiftieth term (a50) = 7.1 Find the first term (a) and the common difference (d). Also find the sum of the first fifty terms (Sn50) of the progression.


p(x)=2x^3 + 7x^2 + 2x - 3. (a) Use the factor theorem to prove that x + 3 is a factor of p(x). (b) Simplify the expression (2x^3 + 7x^2 + 2x - 3)/(4x^2-1), x!= +- 0.5


How do I find and determine the nature of stationary points of a function?


A curve has equation -2x^3 - x^2 + 20x . The curve has a stationary point at the point M where x = −2. Find the x-coordinate of the other stationary point of the curve.


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