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adison please give me right answers

FINd THE PERID OF THIS FUNCTION

nx+n-[nx+n]+tan

x/2

calculus-> what is d/dx of x!
! means factorial

choice->a)ln x
b)ln x+ln (x-1)+ln (x-2)+.........
c)1
d)none of these

FIND DIFFERENTIAL OF THE EQUETION OF THE CIRCLE

ans of Q1
for maximun electric force df/dq = 0
where f = q(Q-q) = qQ - q^2
df/dq = Q - 2q=0
=>. q = Q/2
then the charge were half half divide
& maximum distanes solved by formula
F=Kq2q1/r^2

Animated Letters

give me voat

good question
sent my answers

find the electric feild from the X distance of centre of a squre the charge is 1,2,3,4 micro coulamb