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Limits and Derivatives

JEE Main 2024 (Online) 1st February Evening ShiftMCQMedium📈 Topic in 5% papers+4−1
Ques. 1JEE Main 2024, 1 February (Evening Shift)

Let f(x)= casesx-1, & x is even,\ 2x, & x is odd, cases x . If for some a , f(f(f(a)))=21, then x - \ |x|3a- [ xa ] \, where [t] denotes the greatest integer less than or equal to t, is equal to :

  1. 169
  2. 121
  3. 225
  4. 144

Answer

(4) 144

Solution

a odd: a 2a (even) 2a-1 (odd) 4a-2 (even) 21

a even: a -1 (odd) 2a-2 (even) 2a-3=21 =12

As x 12-: x12 1- [ x12 ]=0

Limit = 12312-0=144

Answer: (4)

Keep practising — Limits and Derivatives

Ques. 2JEE Main 2024, 31 January (Morning Shift)

x 0 e2| x|-2| x|-1x2

  1. is equal to 1
  2. does not exist
  3. is equal to -1
  4. is equal to 2
Ques. 3JEE Main 2024, 31 January (Evening Shift)

Let f: R (0, ) be a strictly increasing function such that x f(7x)f(x)=1. Then, the value of x [ f(5x)f(x)-1 ] is equal to

  1. 0
  2. 4
  3. 1
  4. 7/5
Ques. 4JEE Main 2024, 31 January (Evening Shift)

If x 0 ax2ex-b e(1+x)+cxe-xx2 x=1, then 16 (a2+b2+c2 ) is equal to .

Ques. 5JEE Main 2024, 30 January (Morning Shift)

Let f: [- 2, 2 ] be a differentiable function such that f(0)= 12. If the x 0 x 0x f(t) dtex2-1= , then 8 2 is equal to :

  1. 4
  2. 2
  3. 1
  4. 16
Ques. 6JEE Main 2024, 29 January (Morning Shift)

Suppose f(x)= (2x+2-x ) x -1 (x2-x+1 ) (7x2+3x+1 )3. Then the value of f (0) is equal to

  1. 0
  2. 2
Ques. 7JEE Main 2024, 29 January (Morning Shift)

x 2 ( 1 (x- 2 )2 x3 ( 2 )3 (t 13 )dt ) is equal to

  1. 3 24
  2. 3 28
  3. 3 4
  4. 3 8
Ques. 8JEE Main 2024, 29 January (Evening Shift)

Let the slope of the line 45x+5y+3=0 be 27r1+ 9r22 for some r1, r2 R. Then x 3 ( 3x 8t2 3r2x2-r2x2-r1x3-3x dt ) is equal to .

Ques. 9JEE Main 2024, 27 January (Morning Shift)

If a= x 0 1+ 1+x4- 2x4 and b= x 0 2x 2- 1+ x, then the value of ab3 is :

  1. 36
  2. 25
  3. 32
  4. 30
Ques. 10JEE Main 2024, 27 January (Evening Shift)

If x 0 3+ x+ x+ e(1-x)3 2x= 13, then 2 - is equal to :

  1. 2
  2. 1
  3. 5
  4. 7

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