2 votes 2 votes Calculus engineering-mathematics maxima-minima gateforum-test-series + – vishal chugh asked Jan 12, 2018 vishal chugh 427 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply Ashwin Kulkarni commented Jan 12, 2018 reply Follow Share A) Increasing?? 1 votes 1 votes Kishan Kumar commented Jan 12, 2018 i edited by Kishan Kumar Jan 12, 2018 reply Follow Share The stationary point is imaginary which is outside the function domain. So it means there is no stationary point. Answer should be A. Please post the answer. 1 votes 1 votes vishal chugh commented Jan 12, 2018 reply Follow Share Yes it is A. Can you please elaborate a little more why A is the ans. 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes $\frac{\mathrm{d} (x^3+bx^2+cx+d)}{\mathrm{d} x}= (3x^2+2bx+c)$ $x=\frac{\mathrm{b^{2}\pm \sqrt{b^2-4c}} }{\mathrm{2} }$ $b^{2}-4c$<0 (0 <$b^{2}$< c) $(3x^2+2bx+c)>0 $ Hence Increasing Neeraj Chandrakar answered Jan 20, 2018 Neeraj Chandrakar comment Share Follow See all 0 reply Please log in or register to add a comment.