In a $\triangle A E X, T$ is the mid-point of $X E$ and $P$ is the mid-point of $E T$. If the $\triangle A P E$ is equilateral of side length equal to unity, then which of the following alternative is not correct?
$A X=\sqrt{13}$
$\angle E A T=90^{\circ}$
$\cos \triangle X A E=\frac{-1}{\sqrt{13}}$
$A T=\frac{1}{\sqrt{3}}$
Let $f$ be a non-negative function defined on the interval $[0,1]$. If $\int_0^x \sqrt{1-(f(t))^2} d t =\int_0^x f(t) d t, 0 \leq x \leq 1$ and $f(0)=0$, then
$f\left(\frac{1}{2}\right)<\frac{1}{2}$ and $f\left(\frac{1}{3}\right)>\frac{1}{3}$
$f\left(\frac{1}{2}\right)<\frac{1}{2}$ and $f\left(\frac{1}{3}\right)<\frac{1}{3}$
$f\left(\frac{1}{2}\right)>\frac{1}{2}$ and $f\left(\frac{1}{3}\right)>\frac{1}{3}$
$f\left(\frac{1}{2}\right)>\frac{1}{2}$ and $f\left(\frac{1}{3}\right)<\frac{1}{3}$
The set of real value of $x$ for which $\log _{0.2} \frac{x+2}{x} \leq 1$ is
$\left(-\infty,-\frac{5}{2}\right] \cup(0, \infty)$
$(-\infty,-2) \cup[0, \infty)$
$\left[\frac{5}{2}, \infty\right)$
None of these
Sum to 10 terms of the series $1+2(1 \cdot 1)+3(1 \cdot 1)^2+4(1 \cdot 1)^3+$ $\_\_\_\_$ is
85.12
96.75
92.5
100
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