Ответ:
Пошаговое объяснение:
3 . ( a/( a - 3 ) + ( 3 - a )/( a + 3 ) ) • ( 3 + a )/( 1 - a ) = - 9/( a - 3 ) .
1) a/( a - 3 ) + ( 3 - a )/( a + 3 ) =[a( a + 3) -(a - 3)² ]/[ (a - 3 )( a + 3 ) ] =
= ( a² + 3a - a² + 6a - 9 )/[ (a - 3 )( a + 3 ) ] = ( 9a - 9 )/[ (a - 3 )( a + 3 ) ] ;
2) 9( a - 1 )/[ (a - 3 )( a + 3 ) ] * [ ( a + 3 )/( 1 - a ) ] = - 9/( a - 3 ) .
4 . 64x + x⁻¹ = - 16 ; │X ( x ≠ 0 )
64x² + 1 = - 16x ;
64x² + 16x + 1 = 0 ; D = 0 ; x = - 1/8 ≠ 0 .
В - дь : x = - 1/8 .
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Ответ:
Пошаговое объяснение:
3 . ( a/( a - 3 ) + ( 3 - a )/( a + 3 ) ) • ( 3 + a )/( 1 - a ) = - 9/( a - 3 ) .
1) a/( a - 3 ) + ( 3 - a )/( a + 3 ) =[a( a + 3) -(a - 3)² ]/[ (a - 3 )( a + 3 ) ] =
= ( a² + 3a - a² + 6a - 9 )/[ (a - 3 )( a + 3 ) ] = ( 9a - 9 )/[ (a - 3 )( a + 3 ) ] ;
2) 9( a - 1 )/[ (a - 3 )( a + 3 ) ] * [ ( a + 3 )/( 1 - a ) ] = - 9/( a - 3 ) .
4 . 64x + x⁻¹ = - 16 ; │X ( x ≠ 0 )
64x² + 1 = - 16x ;
64x² + 16x + 1 = 0 ; D = 0 ; x = - 1/8 ≠ 0 .
В - дь : x = - 1/8 .