Find the roots of this equation: y=(8-x)lnx
To find the roots, let y=0 and find the places where the graph crosses the x-axis. When y=0, (8-x)lnx =0. This can be solved by splitting the terms and putting each =0. This is because if the answer is 0, one or both of the two things multiplied together must be equal to 0. Therefore, (8-x)=0 and lnx=0. These solve to give x=8 and x=1.
ES
Related Maths A Level answers
All answers ▸A girl kicks a ball at a horizontal speed of 15ms^1 off of a ledge 20m above the ground. What is the horizontal displacement of the ball when it hits the ground?
Integrate sin^4(x)
How do I know which SUVAT equation to use?
Prove the square root of 2 is irrational