Learn

Saturday, 31 October

JEE Main 2022 · MathsMultiple choiceSingle correctMediumConceptual

JEE Main 29 June 2022, Shift 2, Maths Q6

Question 6 of 90 in this shift, Maths question 6 of 30, Section A.

Let f:R→Rf : \mathbb{R} \to \mathbb{R} be a function defined by f(x)=(x−3)n1(x−5)n2f(x) = (x - 3)^{n_1}(x - 5)^{n_2}, n1,n2∈Nn_1, n_2 \in \mathbb{N}. Then, which of the following is NOT true?
  1. (1)For n1=3n_1 = 3, n2=4n_2 = 4, there exists α∈(3,5)\alpha \in (3, 5) where ff attains local maxima.
  2. (2)For n1=4n_1 = 4, n2=3n_2 = 3, there exists α∈(3,5)\alpha \in (3, 5) where ff attains local minima.
  3. (3)For n1=3n_1 = 3, n2=5n_2 = 5, there exists α∈(3,5)\alpha \in (3, 5) where ff attains local maxima.Official answer
  4. (4)For n1=4n_1 = 4, n2=6n_2 = 6, there exists α∈(3,5)\alpha \in (3, 5) where ff attains local maxima.

Official answer

Option 3

NTA final key.