1
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $Z=r(\cos \theta+i \sin \theta),\left(\theta \neq-\frac{\pi}{2}\right)$ is solution of $x^3=i$, then $r^9(\cos \theta+i \sin \theta)^9=x^{3-}=i$

A

$\frac{\sqrt{3}}{2}+\frac{1}{2} i$

B

1

C

$-i$

D

$\frac{-\sqrt{3}}{2}+\frac{1}{2}$

2
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\omega \neq 1$ is a cube root of unity, then one root among the 7th roots of $(1+\omega)$ is

A

$1+\omega$

B

$1-\omega$

C

$\omega-\omega^2$

D

$\frac{\omega}{\omega-\omega^2}$

3
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

$f(x)=x^2-2(4 k-1) x+g(k)>0, \forall x \in R$ and for $k \in(a, b)$. If $g(k)=15 k^2-2 k-7$, then

A

$g(K)$ attains its maximum at the mid-point of $(a, b)$

B

$g(K)$ attains its minimum at two points in $(a, b)$

C

$g(K)$ attains its both maximum and minimum in $(a, b)$

D

$g(K)$ attain no maximum and no minimum in $(a, b)$

4
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If local maximum of $f(x)=\frac{a x+b}{(x-1)(x-4)}$ exists at $(2,-1)$, then $a+b=$

A

0

B

-1

C

1

D

2

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