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Asseration (A) : f(x)=x^3 has no extremu...

Asseration (A) : `f(x)=x^3` has no extremum at x=0
Reason (R ) : `f^1(a)=0` is only necessary condition for f(x) to have extremum at x=0

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true and R is not the correct explanation of A

C

A is true, R is false

D

A is false, R is true

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