Question

My answer is (2) plz show working

Answer 1

hi

f = -R/2

given : m = -n

m = f/f-u = -(R/2) / (-R/2 -u) = -n

then -n = R/(R+2u)

R= -Rn - 2nu

R+ Rn= -2u

(-R-Rn) / 2n = u

-R(n+1) / 2n = u


seldon :)