sir , can you please help me solving this question :- Q:-If the function f:R->R defined by f(x)=4^x/4^x+2 , then show that f(1+x)=1-f(x)
Asked by Bharadwaj.R.S
| 6th Aug, 2010,
12:00: AM
Expert Answer:
If we assume you meant,
f(x) = 4x/(4x+2)
Then
f(1+x) = 41+x/(41+x+2)
= 4(4x/(4(4x)+2)
= 2(4x/(2(4x)+1)
= 2/(2+1/4x)
= 2/(2+4-x)
= 1 - f(-x)
{ 1 - f(-x) = 1 - 4-x/(4-x+2) = 2/(2+4-x) }
Regards,
Team,
TopperLearning.
f(1+x) = 41+x/(41+x+2)
= 4(4x/(4(4x)+2)
= 2(4x/(2(4x)+1)
= 2/(2+1/4x)
= 2/(2+4-x)
= 1 - f(-x)
{ 1 - f(-x) = 1 - 4-x/(4-x+2) = 2/(2+4-x) }
Answered by
| 6th Aug, 2010,
09:41: PM
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