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Byju's Answer
Standard XII
Mathematics
AM,GM,HM Inequality
If p and ...
Question
If
p
and
q
both are perfect squares, then
√
p
q
is always a rational number. Is the statement true?
A
Yes
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B
No
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C
Cannot be determined
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D
None of these
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Solution
The correct option is
A
Yes
if
p
and
q
are perfect squares, then we can write
p
=
x
2
and
q
=
y
2
√
p
q
=
√
x
2
y
2
=
x
y
=
a rational number.
So, the given statement is true .
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Similar questions
Q.
Write true (T) or false (F) for the following statements:
(i)
√
0.9
=
0.3
(ii) If
a
is a natural number, then
√
a
is a rational number.
(iii) If
a
is negative, then
a
2
is also negative.
(iv) If
p
and
q
are perfect squares, then
√
p
q
is a rational number.
(v) The square root of a prime number may be obtained approximately, but never exactly.
Q.
Question 3
State whether the following statements are true or false? Justify your answer.
(i)
√
2
3
is a rational number.
(ii) There are infinitely many integers between any two integers.
(iii) Number of rational numbers between 15 and 18 is finite.
(iv) There are numbers which cannot be written in the form
p
q
,
q
≠
0
p and q both are integers.
(v) The square of an irrational number is always rational.
(vi)
√
12
√
3
is not a rational number as
√
1
2
and
√
3
are not integers.
(vii)
√
15
√
3
is written in the form
p
q
, so it is a rational number.
Q.
If
p
q
is a rational number, then p and q must be natural numbers.
Q.
Which of the following options hold?
(1) Every integer is a rational number and every fraction is a rational number.
(2) A rational number
p
q
is positive if p and q are either both positive or both negative.
(3) A rational number
p
q
is negative if one of p and q is positive and other is negative.
(4) If there are two rational numbers with common denominator then the one with the larger numerator is larger than the other.
Q.
Which of the following options is correct?
(1) Every integer and fraction is a rational number.
(2) A rational number
p
q
is positive if p and q are either both positive or both negative.
(3) A rational number
p
q
is negative if one of p and q is positive and other is negative.
(4) If there are two rational numbers with same denominator, then the one with the larger numerator is larger than the other.
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