Question

Solution set of the inequality 20x≤90 when x∈N, where N is a set of natural numbers, is
{…,1,2,3,4}
{…,1,2,3,4,4.5}
{1,2,3,4,4.5}
{1,2,3,4}​

Answer 1

Given : 20x ≤90  

x ∈N, where N is a set of natural numbers

To Find : Solution Set

Solution:  

20x ≤90  

=> 2x   ≤ 9

=>  x  ≤ 9 /2

x ∈N, where N is a set of natural numbers

=> x  = 1 , 2 ,3 , 4

{  1, 2 , 3 , 4}  is solution set for  20x ≤90  

x ∈N, where N is a set of natural numbers

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