Question

If f: A → R, then the range of 'f' where A = {1, 2, 3, 4} and f(x) = x² + x + 2​

Answer 1

Step-by-step explanation:

Given A={1,2,3,4}

f:A→R such that f(x)=x+1x2/x+1

f(1)=1+11/2−1+1=2/1

f(2)=2+12/2−2+1=3/4−2+1=3/3=1

f(3)=3+13/2−3+1=4/9−3+1=4/7

f(4)=4+14/2−4+1=5/16−4+1=5/13

∴ Range of f={21,1,