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Question

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Answer 1

1 / ( 2V7 - V5 ) = ( 2V7 + V5 ) / ( ( 2V7 - V5 )•( 2V7 + V5 )) = ( 2V7 + V5 ) / ( 4•7 - 5 ) = ( 2V7 + V5 ) / 23 = 1/23•( 2V7 + V5 ) = 2/23V7 + 1/23V5

Comments

V корень квадратный