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प्रश्न
If a = – 1, b = 2, then find the value of the following:
ab × ba
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उत्तर
Given, ab × ba
If a = –1 and b = 2,
Then (–1)2 × (2)–1
= `1 xx 1/2` ...`[∵ a^-m = 1/a^m]`
= `1/2`
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