1x1!+2x2!+…+nxn! = (n+1)! +1

5 nom ber questions

1. Physics and maths ncert Hindi me

|x 2 2

2 x 2

2 2 x| =0

|x 2 2

2 x 2

2 2 x| =0

a wire of resistane R ,length L and area of cross section A is cut into 2 parts , having ratio of their lengths 1:2. the shorter wire is now stretched till its length becomes equal to that of longer wire . if now the 2 parts are connected in parallel than find equivalent resistance

x-y=0.9,1.1/x y=2