`(15^(40))/(100)` find R.

(35^(40))/(100) Find R.

((37)^(100))/(7) find R.

Let f be a real valued function defined on R (the set of all real numbers) such that f(1)=f(-1)=5 and whose graph of f is symmetrical with respect to the lines x=+-1. Given sum_(r=50)^(99)f((r)/(100)) and sum_(r=50)^(150)f((-r)/(100))=5. If S=sum_(r=50)^(150)f((r)/(100))+sum_(r=50)^(150)f((-r)/(100)). Then find S .

If ""^(15)C_(3r) = ""^(15)C_(r+3) , find r.

If (P)/(15)=(Q)/(21)=(R)/(7) then find the ratio P:Q:R

If ^(15)C_(3r)=^(15)C_(r+3), then find r

(1!+2!+---------+100!)/(7) find R