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प्रश्न
If a = – 1, b = 2, then find the value of the following:
ab + ba
उत्तर
Given, ab + ba
If a = –1 and b = 2,
Then (–1)2 + (2)–1
= `1 + 1/2` ...`[∵ a^-m = 1/a^m]`
= `(2 + 1)/2`
= `3/2`
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