Recent content by juliany

Homework Statement Find the five values of (1+i√3)^(3/5) This question was from my recent end of year exam, I hadn't come across a question like it in my revision, does it mean find the five roots of (1+i√3)^(3/5) ?:confused:

Thanks:smile:

Solved! Homework Statement A 3 tonne cannon fires a 20kg cannonball horizontally at a speed of 250m/s at a target 200 metres away. The cannon is 1 metre above ground level a. Determine the recoil velocity of the cannon. b. Assuming the cannon is wel aimed, will the cannon ball hit the...

:smile:Ok, thanks alot.

Yes it was, how did you figure out that you can't solve for x?

:blushing:Woops, was thinking the same base rule. Can you go: log3^(2x-9)-log3^x^2=-2 Therefore: Log3 (2x-9)/x^2=-2?

So that would make it 2x-9log3-2xlog3=-2 Therefore: 2x-9-2x=-2?

Homework Statement Solve: log3^(2x-9)-2log3^x=-2 Homework Equations None The Attempt at a Solution I am confused with one part of this equation. With the 2log3^x, can you move the x to the front to make it 2x log3?

Homework Statement I'm just confused about a few little indicial equations. 1. 3^2x-36X3^x=-243 2.5(x+2)^2=80 The Attempt at a Solution 1.3^2x X 3^x=-207 2.5(x^2+4x+4)=80 5x^2+20x+20=80 5x^2+20x=60 Unsure what to do after both of them.

Thanks for replying. Does this mean that final velocity(v)=initial velocity(u) which is 29.4ms^-1?

Hello all, I'm a 15 year old student in year 11 in Tasmania, Australia. This was a question from my Physical Sciences class that I was a bit confused about. Any help would be greatly appreciated. Homework Statement A stone is thrown vertically into the air and caught at the same height. It...