Question 30 Encircle the odd one of the following-a -1 -1b -1 -1 -1c -1 -1 -1 -1d -1 -1 -1 -1 -1 -1

(a) ( 1) × ( 1) = 1 (b) ( 1) × ( 1) × ( 1) = 1 (c) ( 1) × ( 1) × ( 1) × ( 1) = 1 (d) ( 1) × ( 1) × ( 1) × ( 1) × ( 1) × ( 1) = 1 Here value of options (a), (c) ...

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Standard X

Mathematics

Finite and Infinite Sets

Question 30 E...

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Question 30

Encircle the odd one of the following:

(a) $(- 1) \times (- 1)$
(b) $(- 1) \times (- 1) \times (- 1)$
(c) $(- 1) \times (- 1) \times (- 1) \times (- 1)$
(d) $(- 1) \times (- 1) \times (- 1) \times (- 1) \times (- 1) \times (- 1)$

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Solution

(a) $(- 1) \times (- 1) = 1$
(b) $(- 1) \times (- 1) \times (- 1) = - 1$
(c) $(- 1) \times (- 1) \times (- 1) \times (- 1) = 1$
(d) $(- 1) \times (- 1) \times (- 1) \times (- 1) \times (- 1) \times (- 1) = 1$
Here value of options (a), (c), (d), are same but value of option (b) is different. Hence, option (b) is the odd one.

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Question 30 Encircle the odd one of the following: (a) (−1)×(−1) (b) (−1)×(−1)×(−1) (c) (−1)×(−1)×(−1)×(−1) (d) (−1)×(−1)×(−1)×(−1)×(−1)×(−1)

(a) (−1)×(−1)=1 (b) (−1)×(−1)×(−1)=−1 (c) (−1)×(−1)×(−1)×(−1)=1 (d) (−1)×(−1)×(−1)×(−1)×(−1)×(−1)=1 Here value of options (a), (c), (d), are same but value of option (b) is different. Hence, option (b) is the odd one.

Question 30

Encircle the odd one of the following:

(a) $(- 1) \times (- 1)$
(b) $(- 1) \times (- 1) \times (- 1)$
(c) $(- 1) \times (- 1) \times (- 1) \times (- 1)$
(d) $(- 1) \times (- 1) \times (- 1) \times (- 1) \times (- 1) \times (- 1)$