Question

If f = {(1, 2), (2, – 3), (3, – 1)} find 2f

Answer 1

Answer:

f = {(1, 2), (2, -3), (3, -1)}

According to it , we have  

   f(1) = 2   ,     f(2) = - 3   ,   f(3)  = - 1

i. 2f

Solution:  2f(1) = 2(2) = 4  ,     2f(2) = 2(- 3) = -6   ,   2f(3)  = 2(- 1) = -2

ii. 2 + f

Solution:  2 + f(1) = 2 + 2 = 4   ,     2 + f(2) = 2 + ( - 3 ) = 2 - 3 = - 1   ,  

                  2 + f(3)  = 2 + (- 1) = 2 - 1 = 1

Answer 2

Step-by-step explanation:

$x + y = 5$

$55365856 \times 2555255$