Q.5. If f(x) =
ax+b
then f [f(x)]=....
CX-a
O 1y
Answers
Answered by
3
Answer:
d =- a
Step-by-step explanation:
f(f(x))=
cf(x)+d
af(x)+b
f(f(x))=
c
cx+d
ax+b
+d
a
cx+d
ax+b
+b
f(f(x))=
acx+bc+d
2
+dcx
a
2
x+ab+bcx+bd
=x
⇒a
2
x+ab+bcx+bd=acx
2
+bcx+d
2
x+dcx
2
Given a=−d, the above equation can also be verified
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Answered by
1
Step-by-step explanation:
f(f(x))=
cf(x)+d
af(x)+b
f(f(x))=
c
cx+d
ax+b
+d
a
cx+d
ax+b
+b
f(f(x))=
acx+bc+d
2
+dcx
a
2
x+ab+bcx+bd
=x
⇒a
2
x+ab+bcx+bd=acx
2
+bcx+d
2
x+dcx
2
Given a=−d, the above equation can also be verified
mark me as brainlist
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