Re: Maths Doubt

Posted by Noel on May 01, 2014; 9:44pm
URL: http://discussion-forum.276.s1.nabble.com/Maths-Doubt-tp7588202p7588217.html

f has a root in (0,1) because f(0) is negative and f(1) is positive and f being a polynomial is continuous

now f '(x)=5x^4 +21x^2 +13 which is always +ve so since f is always increasing hence there can be only one real root