Question

Value of -1/i^-39 is:

• A. 1
• B. -1
• C. i
• D. -i

Answer 1

Answer:

C. i

$\frac{-1}{i^{-39}}$

$a^{-n}=1/a$

$i^{-39}=\frac{1}{i^{39}}$

$\frac{-1}{i^{-39}}$

$= -1\times{i^{39}}$

$=-1\times{-i}$

$=i$

$\because{i^{39}=-i}$