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Let f(x)=x(x^2+mx+n)+2, for all x in R a...

Let `f(x)=x(x^2+mx+n)+2`, for all `x in R` and `m,n in R`. If Rolle's theorem holds for `f(x)` at `x=4/3` in `in [1,2]`, then (m+n) equals

A

1

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2

C

3

D

4

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The correct Answer is:
C
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NTA MOCK TESTS-NTA TPC JEE MAIN TEST 68-MATHEMATICS
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