Exact set of values of $a$ for which ${x^3}(x + 1) = 2(x + a)(x + 2a)$ is having four real solutions is
$[-1,2]$
$[-3,7]$
$[-2,4]$
$\left[ { - \frac{1}{8},\frac{1}{2}} \right]$
The number of solution$(s)$ of the equation $ln(lnx)$ = $log_xe$ is -
The number of solutions of the equation $\log _{(x+1)}\left(2 x^{2}+7 x+5\right)+\log _{(2 x+5)}(x+1)^{2}-4=0, x\,>\,0$, is $....$
Let $a, b, c, d$ be real numbers such that $|a-b|=2$, $|b-c|=3,|c-d|=4$. Then, the sum of all possible values of $|a-d|$ is
Number of natural solutions of the equation $xyz = 2^5 \times 3^2 \times 5^2$ is equal to
What is the sum of all natural numbers $n$ such that the product of the digits of $n$ (in base $10$ ) is equal to $n^2-10 n-36 ?$