1.

Solve as directed: 2x + 3 gt 15 in integers, in natural numbers.

Answer»

SOLUTION :2x + 3 `GT` 15
`rArr 2x + 3-3 `gt` 15-3
`rArr 2x gt 12`
`(2x)/2 gt (12)/2`
`x gt 6`
If x `in` Z then the solution set isS = {x:x `in` Z and x `gt` 6}
= {7,8,9………}
If x `in` then the solution set is S = {x:x `in` N and x `gt` 6}
{7,8,9.......}


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