exam Maths Puzzle Numerical Ability

What is the range for the function

y=-2x^2+4x

Read Solution (Total 0)

exam Other Question

Ok, Dolly if you're out there I have one more for you and I'll leave you alone.

Solve e^x - e^-x / 2 = -1

I somehow have log 1/2 (-1 + sqroot of 3) ? I think i missed some
Please help me solve.
Thank You

3 sqrt 512x^8/y^3