if A = {- 2, 0, - 1, 1, 2) and f : A B is an onto function defined by f ( x ) = x2+x+1 then find B.
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given
A = {- 2, 0, - 1, 1, 2)
f ( x ) = x2+x+1
f : A B is an onto function
f(-2)=4-2+1=3
f(0)=0+0+1=1
f(-1)=1-1+1=1
f(1)=1+1+1=3
f(2)=4+2+1=7
f(A)=B
f(-2,0,-1,1,2)=(3,1,1,3,7)
therefore B=(3,1,1,3,7)
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