a point charge q is placed
at (0,a/2,0) . find flux
due to point charge through
a square sheet of side a
in xz plane whose centre
coincides with orign.
( do not use gauss law)
if three persons selected at random
are stopped on a street,what is
the probability that
(i)all were born on a friday?
(ii)two were born on a friday and
the others on a thursday?
(iii)none was born on a friday
1) find the radius of convergence?for
Σ_(n=1) ^∞ (x^n /(n(n+1)(n+2))) and calculate its sum
2) find the value of Σ_(n=1) ^∞ (((−1)^n )/(n 2^n (n+1)(n+2)))