Question

what is the magnification of
1 ) concave and convex mirror
2 ) convex and concave lens

kindly only mention whether it positive or negative

Answer 1

1-concave mirror=negative
Convex mirror=positive.

Answer 2

magnification of concave mirror is positive and that of convex mirror is either negative or positive depends on position of object . AND that of convex lens is same it can be positive and negative depending on position of object and concave lens is positive