Recent content by LiHJ

Thank you Mr Bridge and Mentallic for attending to my query

I also know about the surface area of a sphere is $$4πr^2$$

I haven't learned about that, the formula that I listed is what I know from now. Thanks

Homework Statement Dear Mentors and PF helpers, I can do part (a) and (b) but don't really know how to do (c) and (d). Can somebody teach me how to go about solving it. Homework Equations Volume of cone: $$\frac{1}{3}πr^2h$$ Volume of cylinder: $$πr^2h$$ Volume of sphere...

Homework Statement Dear Mentors and PF helpers, Here's the question: The roots of a quadratic equation $$3x^2-\sqrt{24}x-2=0$$ are m and n where m > n . Without using a calculator, a) show that $$1/m+1/n=-\sqrt{6}$$ b) find the value of 4/m - 2/n in the form $$\sqrt{a}-\sqrt{b}$$ Homework...

<< Mentor Note -- OP has been advised to type their questions into the forum next time, instead of inserting images >>[/color] 1. Homework Statement Dear Mentors and PF helpers, I have a question from today's lesson. Homework EquationsThe Attempt at a Solution Is 1) and 2) both...

Thank you;)

Because the question mention that Q is the midpoint of OR and PQ is parallel to SR. So triangle OPQ is similar to triangle OSR. Therefore P is a midpoint of OS

Homework Statement Dear Mentors and PF Helpers, Here's the question: Homework EquationsThe Attempt at a Solution Here's my solutions: Please let me know whether I'm right. Thank you [/B]

Thank you

Sorry forgot to copied these as well

Homework Statement Dear Mentors PF Helpers, Here's my question: I see it from my textbook with it solutions copied down below. Wonder is there another way to do it. Thank you for your time.Homework Equations [/B]The Attempt at a Solution

Thank you ehild and PWiz, Now I changed the question the other way round, it has to be less than or equal to zero.

Dear ehild and PWiz, I have corrected it. Please help me to do corrections if there's error. There's one more thing that I need clarification is that on ehild 2nd post, states that if the numerator could not be zero, it coluld be entire negative. What this means. I know that if we multiply...