Question

f(x)=x3+kx2 = 4x-1 2 এর g (a)=1+a3 +a6 _a3 দুইটি ফাংশন​

Answer 1

Object distance means what is the distance between pole and object. Image distance means when image is formed then the distance between pole and image is called image distance. Focal length is the distance between pole and the principal focus of the mirror.