Question

given f : R (arrow sign) R , defined by f(x) = 2x-3 . if the ordered pairs (a,8) and (10,b) belongs to 'f' , find a and b.

Answer 1

Step-by-step explanation:

now the function R to R defined by 2x-3

then , f (x) = 2x-3

(1) (a,8)

putting a for x we get 8

so f (x)=8

and 2a -3=8

2a =11

a =11/2

now

(2) (10 ,b)

here f (x)=b

2×10 -3 =b

b =17