Posted by sunny on Friday, December 16, 2011 at 9:17am.
i am trying to solve 4/x2>5. i use calculator and mistakenly type of digit if other than 5. when i type in the problem ,so i get the wrong solution my answer was 2<x<y. what did i mistakenly type in?

maths  Anonymous, Friday, December 16, 2011 at 10:39am
4 / x  2 > 5
4 / x > 5 + 2
4 / x > 7 Multiply both sides with x
4 > 7 x Divide both sides with 7
4 / 7 > x
This mean:
x < 4 / 7
x must be > 0 besouse in expresion:
4 / x  2 > 5
4 / 0 = undefined
So solution are:
0 < x < 4 / 7

maths  Anonymous, Friday, December 16, 2011 at 10:47am
For negative numbers 4 / x  2 is always negative so negative numbers canĀ“t be sloutions.
Answer This Question
Related Questions
 algebra  solve by the elimination method 3r  7s =29 7r + 3s = 29 What is the ...
 Math  Solve by the elimination method. 4x +5y=1 8x +10y=2 What is the solution ...
 mathematics  seeds of type A and type B are sold in packets, each must contain ...
 Math  How do you set this problem up to solve and how do you solve this? Ellen ...
 Math Algebra  Question:: You are about to take a test that contains questions ...
 relations and functions  Seeds of type A and type B are sold ihna packet each ...
 How can blood type A donate to AB???  From my understanding, blood type A has A...
 biology  Give the phenotype and genotype for the F2 generation of a person with...
 Precalculus  How can I type this equation in the graphing calculator? y=pi(25x...
 math  Solve the system of equations by graphing. Then Classify the system? 4u+v...
More Related Questions