Q.


Classify 7.478478... as rational or irrational.

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

Rational

b

Irrational

c

Both of these

d

None of the above 

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Given number is 7.478478...
Rational numbers:
The numbers which can be expressed in the form of p q  , where p, q integers, and q ≠ 0, are known as rational numbers.

On dividing p by q, if the remainder becomes zero then the decimal expansion is terminating and if the remainder never becomes zero and Set of digits repeats periodically then the decimal expansion is non terminating repeating. It is also known as non terminating recurring decimal expansion.
7.478478: Rewrite the repeating numbers in a bar form:
7.478478….. = 7. 478 ¯  
Applying decimal expansion of real numbers:
478 is repeating continuously, so it has non terminating repeating (recurring ) decimal expansion.
Hence, 7.478478….. is a rational number.
Therefore, the correct option is 1.
 
Watch 3-min video & get full concept clarity
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon
Classify 7.478478... as rational or irrational.