Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2021-12-08 17:05:08

Hannibal lecter
Registered: 2016-02-11
Posts: 330

inversely proportional

A formula representing the statement “q is inversely proportional to the cube root of p and has a positive constant
of proportionality.

the answer was


but I thought the answer would be :-

q = 1/k * p^(1/3)

k is the constant
in book manual solution from where he got the "8" number?

Last edited by Hannibal lecter (2021-12-08 17:14:26)

Wisdom is a tree which grows in the heart and fruits on the tongue


#2 2021-12-08 21:05:34

Registered: 2010-06-20
Posts: 9,358

Re: inversely proportional

Because it's inverse proportion the term with p must be at the bottom of a fraction.

As k is just a number, writing 1/k doesn't satisfy the question.  It's the p term that has to be at the bottom of the fraction.

I've no idea where 8 comes from.  To change k into a number you have to be told one pair of q and p values.


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile


Board footer

Powered by FluxBB