Question

If R = ($a$, $a^3$), where $a$ is an even number less than $5$, what will be the coordinates of R ?

• A. ($2,8$) and ($4,64$)
• B. ($8,2$) and ($64,4$)
• C. ($1,9$) and ($3,9$)
• D. ($9,1$) and ($9,3$)

Answer 1

The correct option is A ($2,8$) and ($4,64$)

We know that $2$ and $4$ are the only even numbers less than $5$.

Therefore, $a$ can take values of $2$ and $4$.

When $a=2$, R= ($2,2^3$) = ($2,8$)
And, when $a=4$, R= ($4,4^3$) = ($4,64$)

So, option (a.) is correct.