Question

let A ={-2,-1,0,1,2} f:A to B an onto faction defined by f(x)=x²+x+1 then find B​

Answer 1

Answer:

for onto function, Range=Co-domain

$f( - 2) = 3$

$f( - 1) = 1$

$f(0) = 1$

$f(1) = 3$

$f(2) = 7$

so B (1,3,7)