Question

answer these questions ​

Answer 1

Answer:

Heyy mate here is ur answer

Step-by-step explanation:

14-a.4/3

13-c. 64

Answer 2

Answer:

14. a. 4/3    

15. d. 2

Step-by-step explanation:

14. (√48 + √32) ÷ (√27 + √18)

Let's split it up one by one.

• √48  = ( √4 × 12) = (2√12) = (2√4 × 3)

         ∴ √48 = 4√3

• √32 = (√4 × 8) = (2√4 × 2)

            ∴ √32 = 4√2

• √27 = (√9 × 3)

       ∴ √27 = 3√3

• √18 = (√9 × 2)

       ∴ √18 = 3√2

Let's substitute the values:

(4√3 + 4√2) ÷ (3√3 + 3√2)

= 4[√3 + √2] ÷ 3[√3 + √2]

= a.4/3

15. x + 1/x = 2          → 1

  x³ + 1/x³ = ?

x² + 1

---------   = 2

   x

  x² + 1 = 2x

x² - 2x + 1 = 0

Factorising,

p = 1, sum = -2        (-1-1=-2)

    x² - x - x + 1 = 0

x(x - 1) - 1(x - 1) = 0

 ⇒ (x - 1)(x - 1) = 0

         ∴ x = 1

Substituting x,

1³ + 1/1³

= 1 + 1

= d. 2