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
Answers
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0
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
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