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प्रश्न
Evaluate:
(−1) × (−1) × (−1) × (−1) × ...70 times
मूल्यांकन
उत्तर
(−1) × (−1) × (−1) × (−1) × ...70 times
Group in pairs
(−1) × (−1) = 1
Each pair of (−1) multiplies to 1. Since there are 70 instances of (−1), we can divide 70 into 35 pairs.
Each of the 35 pairs results in 1. Hence, the entire product is:
1 × 1 × 1 …(35 times) = 1
= 1
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Multiplication and Division of Integers
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