The focal length of lens is 5.0cm. How far from the lens must the opbject be placed to produce an image 1.5cm from the lens

Answer 1

1/d(object) +1/d(image) = 1/F

Answer 2

DATA? f=5,0cm......di=1,5cm....do=?......therefore 1/f=1/do+1/di . ' .1/do=1/f-1/di=-7/15 . ' .do=-2,14 (the distance is negative that means the object is placed behind the lense)

Answer 3

I dont kmnowv thev answer .