i^(400)=1

If A=[(1,0),(1//2,1)] , A^(400) is equal to

Find the value of (-1)^(301)+(-1)^(302)+(-1)^(303)+.......+(-1)^(400) .

If x_(1), x_(2),…..x_(n) are n observations such that Sigmax_(i)^(2)=400 and Sigmax_(i)=80 then the least value of n is

Are the data n=10 sum_i x_i^2=400,overlinex=7 , consistent ?

Calculate pH of mixture of (400mL,(1)/(200)M Ba(OH)_(2))+(400mL.(1)/(50)M HCl)+(200mL "of water")

Calculate pH of mixture of (400mL,(1)/(200)M Ba(OH)_(2))+(400mL.(1)/(50)M HCl)+(200mL "of water")

Evaluate : (1)/(1sqrt(2)+2sqrt(1))+(1)/(2sqrt(3)+3sqrt(2))+......+(1)/(399sqrt(400)+400sqrt(399))

For a substance A, vapour pressure of liquid and solid state at temperature 400K is 0.1 "bar" and 0.16 "bar" respectively. What will be Gibbs free energy change for the following process. A(s)[0.1"bar",400K,n=1]toA(l) [0.16"bar",400K,n=1]