Let f be a function defined by f:x-- 5x2+2; xER
- Find the image of 3 under f.
- Find f(3).f(2)
- Find x such that f(x) =22
for finding the image of 3 under f, we take x=3
5(3*3) + 2 = 47 Ans.= 47
similarly f(3) = 47
f(2) = 22
hence, f(3).f(2) = 47*22 =1,034
now, we have to find f(x)=22
= 5x^2 +2=22
= x^2 = 4
= x= +2 or - 2
thumbs up plz if u r satisfied ...