PYQSide ExamsMy practice

Limits and Derivatives · Question 9

JEE Main 2026 (Online) 21st January Morning ShiftMCQMedium📈 Topic in 32% papers+4−1
1

Let f : R (0, ) be a twice differentiable function such that f(3) = 18, f'(3) = 0 and f''(3) = 4. Then x 1 e ( f(2 + x)f(3) ) 18(x - 1)2 is equal to :

  1. 9
  2. 18
  3. 1
  4. 2

Answer

(4) 2

Solution

e mn = n e m

L = x 1 18(x - 1)2 e f(2 + x)f(3)

Put x - 1 = h, h 0:

L = h 0 18 [ e f(3 + h) - e f(3) ]h2 ( 00 )

By L'Hôpital's rule:

L = h 0 18 f'(3 + h)f(3 + h)2h = h 0 9f'(3 + h)h f(3 + h) ( 00 ), since f'(3) = 0

Again by L'Hôpital's rule:

L = h 0 9f''(3 + h)f(3 + h) + h f'(3 + h)

= 9f''(3)f(3) = 9 418 = 2

Answer: (4)

JEE Main 2026 (Online) 21st January Morning Shift

Keep practising — Limits and Derivatives

2

Let f(x) = x3 + x2 f'(1) + 2x f''(2) + f'''(3), x R. Then the value of f'(5) is :

  1. 6575
  2. 1175
  3. 25
  4. 625
JEE Main 2026 (Online) 21st January Evening Shift
3

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

  1. Statement I is false but Statement II is true
  2. Both Statement I and Statement II are false
  3. Both Statement I and Statement II are true
  4. Statement I is true but Statement II is false
JEE Main 2025 (Online) 8th April Evening Shift
4

x 0+ (5(x) 13 ) e (1 + 3x2 ) ( -13 x )2 (e5(x) 43 - 1 ) is equal to

  1. 53
  2. 1
  3. 13
  4. 115
JEE Main 2025 (Online) 7th April Morning Shift
5

If x 1+ (x - 1)(6 + (x - 1)) + (1 - x)(x - 1)3 = -1, where , R, then + is equal to

  1. 20
  2. 19
  3. 18
  4. 17
JEE Main 2025 (Online) 4th April Morning Shift
6

Let f be a differentiable function on R such that f(2)=1, f'(2)=4. Let x 0(f(2+x))3/x=e . Then the number of times the curve y=4x3-4x2-4( -7)x- meets x-axis is :

  1. 3
  2. 1
  3. 2
  4. 0
JEE Main 2025 (Online) 4th April Evening Shift
7

If x 0 ( xx ) 1x2 = p, then 96 e p is equal to

JEE Main 2025 (Online) 3rd April Evening Shift
8

For , , R, if x 0 x2 x + ( - 1)ex2 2x - x = 3, then + - is equal to :

  1. -1
  2. 4
  3. 6
  4. 7
JEE Main 2025 (Online) 2nd April Morning Shift
9

If x 0 (2x) + a (4x) - bx4 is finite, then (a + b) is equal to:

  1. 0
  2. 34
  3. -1
  4. 12
JEE Main 2025 (Online) 2nd April Evening Shift
10

Let [t] be the greatest integer less than or equal to t. Then the least value of p N for which x 0+ (x ( [ 1x ] + [ 2x ] + + [ px ] ) - x2 ( [ 1x2 ] + [ 22x2 ] + + [ 92x2 ] ) ) 1 is equal to .

JEE Main 2025 (Online) 29th January Morning Shift
11

Let f(x) = n r=0n ( (x/2r+1 ) + 3 (x/2r+1 )1 - 2 (x/2r+1 ) ). Then x 0 ex - ef(x)(x - f(x)) is equal to .

JEE Main 2025 (Online) 28th January Evening Shift

All Limits and Derivatives PYQs →

PDFDownload Limits and Derivatives PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main Mathematics chapters