Math, asked by rkhashikaasaai, 9 months ago

Pick out the irrational number from the following numbers: Select one: a. √7 / √28 b. √40 / √20 c. 1 / √ 9 d. - √49

Answers

Answered by MaahiKoyani
0

Answer:

(b) √40/√20

Step-by-step explanation:

√40 = 2√10

__________ = √2

√20 = 2√5

√2 is an irrational number. so correct answer is (b)

Answered by krishna210398
0

Answer:

Concept: pick out the irrational number.

Given: a. √7 / √28 b. √40 / √20 c. 1 / √ 9 d. - √49

To find: an irrational number.

Step-by-step explanation:

as we know that an irrational number is a number in which the  digits after the decimal point is non-ending and non- repeating .

so, a) √7 / √28 is not a irrational number as the divided answer of the two numbers is not a non-ending.

c) 1 / √ 9 is not a irrational number as the answer of the divide is not a non-repeating digits.

d. - √49 is not a irrational number as the root of this number is a perfect number.

so the answer is  b. √40 / √20  as  the breakup of the number is 2√10/2√5 which is √2.

and √2 is an non-ending and non-repeating .

∴b. √40 / √2 is an answer

#SPJ3

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