Question

Which of the following is not a rational number when n = 4 ?
a) 4n/n
b) n-3/n+3
c) n-4/n+4
d) n+4/n-4​

Answer 1

Step-by-step explanation:

I think option number (d)

Answer 2

Question :

Which of the following is not a rational number where n = 4 ?

a) 4n/n

b) n-3/n+3

c) n-4/n+4

d) n+4/n-4

Rational numbers :

The numbers which can be written in the form of p/q where p and q are integers and q is not equal to 0.

Answer :

a) 4n/n

= 4 × 4 ( n = 4 which is given ) /4

= 16/4

= 4

So it's a rational number

b) n-3/n+3

4-3/4+3

1/7

So it's a rational number .

c) n-4/n+4

4-4/4+4

0/4

So it's a rational number.

d) n+4/n-4

4+4/4-4

8/0

Since denominator is zero , so it's not a rational number.

So final answer is option (d)