Question
Wed May 04, 2011 By:
 

x^5+4x^4-3x^3-2x^2-8x-1=0 the no. of maximum positive real roots of the above equation may be------------

Expert Reply
Wed May 04, 2011
The maximum number of positive real roots can be found by counting the number of sign changes in f(x). The actual number of positive real roots may be the maximum, or the maximum decreased by a multiple of two.
Here the sign are: + + - - - -
There is only change in sign from + to -.
So maximum number of +ve real roots is 1.
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