1
GATE EE 2024
MCQ (More than One Correct Answer)
+1
-0.33

Which of the following complex functions is/are analytic on the complex plane?

A

$f(z) = j\text{Re}(z)$

B

$f(z) = \text{Im}(z)$

C

$f(z) = e^{|z|}$

D

$f(z) = z^2 - z$

2
GATE EE 2024
Numerical
+1
-0.33

Consider the complex function $f(z) = \cos z + e^{z^2}$. The coefficient of $z^5$ in the Taylor series expansion of $f(z)$ about the origin is ______ (rounded off to 1 decimal place).

Your input ____
3
GATE EE 2017 Set 1
MCQ (Single Correct Answer)
+1
-0.3
For a complex number $$z,$$
$$\mathop {Lim}\limits_{z \to i} {{{z^2} + 1} \over {{z^3} + 2z - i\left( {{z^2} + 2} \right)}}$$ is
A
$$-2i$$
B
$$-i$$
C
$$i$$
D
$$2i$$
4
GATE EE 2016 Set 2
MCQ (Single Correct Answer)
+1
-0.3
Consider the function $$f\left( z \right) = z + {z^ * }$$ where $$z$$ is a complex variable and $${z^ * }$$ denotes its complex conjugate. Which one of the following is TRUE?
A
$$f(z)$$ is both continuous and analytic
B
$$f(z)$$ is continuous but not analytic
C
$$f(z)$$ is not continuous but is analytic
D
$$f(z)$$ is neither continuous nor analytic
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