Question

please answer the question no 4 and 6 . it's urgent the correct answer will be marked brainlist​

Answer 1

Answer:

Q)4 x = 11 Q)6 128/3

Step-by-step explanation:

x³ + 3x / 3x² + 1 = 341/91

by componendo & dividendo

( x³ + 3x ) + ( 3x² + 1 ) / ( x³ + 3x ) - ( 3x² + 1 ) = 341 + 91 / 341 - 91

x³ + 3x ( x + 1 ) + 1 / x³ - 3x ( x - 1 )- 1 = 432 / 250

( x + 1 )³ / ( x - 1 )³ = 432 / 250

( x + 1 ) / ( x - 1 ) = ( 216/125 )⅓

( x + 1 ) / ( x - 1 ) = 6/5

again by componendo & dividendo

( x + 1 ) + ( x - 1 ) / ( x + 1 ) - ( x - 1 ) = ( 6 + 5 ) / ( 6 - 5)

2x/ 2 = 11/1

x = 11

Q6) 5x - 11y = 2x + 5y

5x - 2x = 5y + 11y

3x = 16y

x/y = 16/3

x : y = 16 : 3

3x² + 2y² / 3x² - 2y²

by componendo & dividendo

(3x² + 2y²) + (3x² - 2y²) / (3x² + 2y²) - (3x² - 2y²)

= 6x² / 4y²

= 3/2 ( x/y )²

= 3/2 × (16/3)² ( from above )

= 3/2 × 256/9

= 128/3