7.
If f(x)=(10 - x^7)^1/7, then fof(x) =
1) 10
2) x
3) x?
4)-1
Answers
Answered by
0
Answer:
f:R→R
f(x)=(3−x
3
)
1/3
fof(x)=f(f(x))
=(3−[f(x)]
3
)
1/3
=[3−(3−x
3
)
3
]
1/3
⇒[3−(3
3
−3.3
2
.x
3
+3.3.x
6
−x
9
)]
1/3
⇒[3−27+27x
3
−9x
6
+x
9
]
1/3
⇒[27x
3
−9x
6
+x
9
−24]
1/3
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