If `[x+[x+[x+.......100` times ]]]=100 then `x` belongs to

2^(x)xx3^(2x)=100 then x belongs to

If 2^(x).3^(2x)=100 then x belong to

If {x}=(2)/(3) and [x+{x+[x+{x+......100xx}]}]= then -

If f(x)=1+x+x^(2)+.......+x^(100) then f'(1)=-

If 25% of x is 100, then x = _____.

If x = 100, then 120% of x =_____.

Let R={x|x inN,x" is a multiple of 3 and x"le100} S={x|x in N, x" is a multiple of 5 and x "le100} What is the number of elements in (RxxS)nn(SxxR) ?

If 25% of x is 100, then x=100(b)200300 (d) 400