Question

If f(x)=2[x]+8 where [x] is greatest integer function of x then

find f(-4.2)

a) -2. b)2. c)0 d)-0.4​

Answer 1

Answer:

d)- 0.4

Step-by-step explanation:

given ,

f(x)= 2x + 8

f(-4.2)= 2×(-4.2)+8

==》-8.4 + 8

==》-0.4