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Find f(x)=2x+3, A={x<=5, x in N}, Find range

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Your problem `->` f(x)=2x+3, A={x<=5, x in N}, Find range


Here `A={x<=5, x in n}`

`:. D_f={1,2,3,4,5}`

Here `f(x)=2x+3`

`f(1)``=2*1+3`

`=2+3`

`=5`

`f(2)``=2*2+3`

`=4+3`

`=7`

`f(3)``=2*3+3`

`=6+3`

`=9`

`f(4)``=2*4+3`

`=8+3`

`=11`

`f(5)``=2*5+3`

`=10+3`

`=13`

`:.R_f={5,7,9,11,13}`






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