0 0 votes The number of non-negative real roots of $2^x - x - 1 =0$ equals _______ $0$ $1$ $2$ $3$ Quantitative Aptitude cat2003-1 quantitative-aptitude algebra + – go_editor 14.2k points 2.4k views answer comment Share Follow Print 0 reply Please log in or register to add a comment.
1 1 vote x=0 and x= 1 are the real root of the equation So answer is C.2 Arnab Bhadra answered Jun 12, 2017 Arnab Bhadra 46 points comment Share Follow 0 reply Please log in or register to add a comment.
0 0 votes $2^{x}$ = x+1 Taking log$\log _{2}$ on both side, we get x = $\log _{2}$(x+1) x = $\log _{2}x*\log _{2}1$ x = 0 I am not sure correct me I m wrong VishalBarkule answered Jun 11, 2017 VishalBarkule 194 points comment Share Follow 0 reply Please log in or register to add a comment.