if f(x) satisfies f(7-x)=f(7+x) for all x belong to real numbers such that f(x) have exactly 5 real roots which are all distinct,such that the sum of real roots is s.Then find s/7
in my view the function must be symmetrical about x=7 and one of the roots must be at x=7 and two roots on right of x=7 and two roots on left of x=7 but i could not proceed further.