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Let


A=(√(2) +√(3) )(√(4) +√(5) )...(√(2020) +√(2021) )\\B=(√(2021) -√(2020) )(√(2019) -√(2018) )...(√(3) -√(2) )
what is A times B?

1 Answer

5 votes

Answer:

1

Explanation:

A)


( √(3 ) - √(2) )( √(3) + √(2) )( √(5 ) - √(4) )( √(5) + √(4) )....

using difference of two squares


( √(a) + √(b) )(√(a) - √(b) ) = a - b

we can rewrite the A) to 1×1×1×1.... so the answer would be 1

User Greepow
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