|
351 |
f(x) is a function such that  and the tangent at any point passes through (1, 2). Find the equation of the tangent. a) x = 2 b) y = 2 c) x + y = 2 d) x – y = 2
f(x) is a function such that and the tangent at any point passes through (1, 2). Find the equation of the tangent. a) x = 2 b) y = 2 c) x + y = 2 d) x – y = 2
|
IIT 2005 |
03:06 min
|
|
352 |
The lines  and  are tangents to the same circle. The radius of this circle is . . . . .
The lines and are tangents to the same circle. The radius of this circle is . . . . .
|
IIT 1984 |
02:30 min
|
|
353 |
The external radii  of ΔABC are in harmonic progression then prove that a, b, c are in arithmetic progression a) True b) False
The external radii of ΔABC are in harmonic progression then prove that a, b, c are in arithmetic progression a) True b) False
|
IIT 1983 |
01:51 min
|
|
354 |
True / False If f (x) = ( a – xn )1/n where a > 0 and n is a positive integer then f ( f ( x ) ) = x. a) True b) False
True / False If f (x) = ( a – xn )1/n where a > 0 and n is a positive integer then f ( f ( x ) ) = x. a) True b) False
|
IIT 1983 |
01:23 min
|
|
355 |
Let f(x) =  If f is continuous for all x, then k is equal to a) 3 b) 5 c) 7 d) 9
Let f(x) = If f is continuous for all x, then k is equal to a) 3 b) 5 c) 7 d) 9
|
IIT 1981 |
03:32 min
|
|
356 |
Fill in the blank The domain of the function f (x) =  is a) [− 2, − 1] b) [1, 2] c) [− 2, − 1] ⋃ [1, 2] d) None of the above
Fill in the blank The domain of the function f (x) = is a) [− 2, − 1] b) [1, 2] c) [− 2, − 1] ⋃ [1, 2] d) None of the above
|
IIT 1984 |
02:48 min
|
|
357 |
Then 
a) 0 b) 1 c) 2 d) 4
|
IIT 1981 |
01:26 min
|
|
358 |
The complex numbers  satisfying  are the vertices of the triangle which is a) of zero area b) right angle isosceles c) equilateral d) obtuse angled isosceles
The complex numbers satisfying are the vertices of the triangle which is a) of zero area b) right angle isosceles c) equilateral d) obtuse angled isosceles
|
IIT 2001 |
05:10 min
|
|
359 |
Let x and y be two real variables such that x > 0 and xy = 1. Find the minimum value of x + y. a) 1 b) 2 c) 3 d) 4
Let x and y be two real variables such that x > 0 and xy = 1. Find the minimum value of x + y. a) 1 b) 2 c) 3 d) 4
|
IIT 1981 |
01:44 min
|
|
360 |
ABC is an isosceles triangle in a circle of radius r. If AB = AC and h is the altitude from A to BC then the triangle ABC has perimeter  , area A = . . . . . Also  . . . . .
ABC is an isosceles triangle in a circle of radius r. If AB = AC and h is the altitude from A to BC then the triangle ABC has perimeter , area A = . . . . . Also . . . . .
|
IIT 1989 |
07:12 min
|
|
361 |
Let f(x) = x|x|. The set of points where f(x) is twice differentiable is . . . . a) ℝ b) 0 c) ℝ − {0, 1}
Let f(x) = x|x|. The set of points where f(x) is twice differentiable is . . . . a) ℝ b) 0 c) ℝ − {0, 1}
|
IIT 1992 |
02:00 min
|
|
362 |
Find the shortest distance of the point (0, c) from the parabola
y = x2, where 0 ≤ c ≤ 5. a)  b)  c)  d) 
Find the shortest distance of the point (0, c) from the parabola
y = x2, where 0 ≤ c ≤ 5. a) b) c) d)
|
IIT 1982 |
03:58 min
|
|
363 |
Both roots of the equation ( x – b) ( x – c) + (x – c) ( x – a) + (x – a) (x – b) = 0 are always a) positive b) negative c) real d) none of these
Both roots of the equation ( x – b) ( x – c) + (x – c) ( x – a) + (x – a) (x – b) = 0 are always a) positive b) negative c) real d) none of these
|
IIT 1980 |
02:52 min
|
|
364 |
a) – 1 b) 0 c) 1 d) 2
a) – 1 b) 0 c) 1 d) 2
|
IIT 1997 |
02:51 min
|
|
365 |
If  is purely real where ω = α + iβ, β ≠ 0 and z ≠ 1 then the set of real values of z is a)  b)  c)  d) 
If is purely real where ω = α + iβ, β ≠ 0 and z ≠ 1 then the set of real values of z is a) b) c) d)
|
IIT 2006 |
05:43 min
|
|
366 |
Two vertices of an equilateral triangle are (- 1, 0) and (1, 0) and its third vertex lies above the X–axis, the equation of circumcircle is . . .
Two vertices of an equilateral triangle are (- 1, 0) and (1, 0) and its third vertex lies above the X–axis, the equation of circumcircle is . . .
|
IIT 1997 |
04:55 min
|
|
367 |
Two towns A and B are 60 meters apart. A school is to be built to serve 150 students in town A and 50 students in town B. If the total distance to be travelled by all the 200 students is to be as small as possible then the school should be built at a) Town B b) 45 km from town A c) Town A d) 45 km from town B
Two towns A and B are 60 meters apart. A school is to be built to serve 150 students in town A and 50 students in town B. If the total distance to be travelled by all the 200 students is to be as small as possible then the school should be built at a) Town B b) 45 km from town A c) Town A d) 45 km from town B
|
IIT 1982 |
01:37 min
|
|
368 |
If a continuous function f defined on the real line ℝ, assumes positive and negative values in ℝ then the equation f(x) = 0 has a root in ℝ. For example, it is known that if a continuous function f on ℝ is positive at some points and its minimum value is negative then the equation f(x) = 0 has a root in ℝ. Consider the function f(x) =  for all real x where k is a real constant. The line y = x meets y =  for k ≤ 0 at a) No point b) One point c) Two points d) More than two points
If a continuous function f defined on the real line ℝ, assumes positive and negative values in ℝ then the equation f(x) = 0 has a root in ℝ. For example, it is known that if a continuous function f on ℝ is positive at some points and its minimum value is negative then the equation f(x) = 0 has a root in ℝ. Consider the function f(x) = for all real x where k is a real constant. The line y = x meets y = for k ≤ 0 at a) No point b) One point c) Two points d) More than two points
|
IIT 2007 |
02:08 min
|
|
369 |
(One or more than one correct answer)
Let  and  be complex numbers such that  and  . If  has positive real part and has negative imaginary part, then  may be a) Zero b) Real and positive c) Real and negative d) None of these
(One or more than one correct answer)
Let and be complex numbers such that and . If has positive real part and has negative imaginary part, then may be a) Zero b) Real and positive c) Real and negative d) None of these
|
IIT 1986 |
05:31 min
|
|
370 |
If  then ab + bc + ca lies in the interval a)  b)  c)  d) 
If then ab + bc + ca lies in the interval a) b) c) d)
|
IIT 1984 |
02:29 min
|
|
371 |
Find the values of x and y for which the following equation is satisfied  a) x = y = −1 b) x = y = 3 c) x = 1, y = 3 d) x = 3, y = −1
Find the values of x and y for which the following equation is satisfied a) x = y = −1 b) x = y = 3 c) x = 1, y = 3 d) x = 3, y = −1
|
IIT 1980 |
05:23 min
|
|
372 |
The equation of the directrix of the parabola y2 + 4y + 4x +2 = 0 is a) x = − 1 b) x = 1 c)  d) 
The equation of the directrix of the parabola y2 + 4y + 4x +2 = 0 is a) x = − 1 b) x = 1 c) d)
|
IIT 2001 |
01:51 min
|
|
373 |
Let α, β be roots of the equation (x – a) (x – b) = c, c ≠ 0. Then the roots of the equation (x – α) (x – β) + c = 0 are a) a, c b) b, c c) a, b d) a + c, b + c
Let α, β be roots of the equation (x – a) (x – b) = c, c ≠ 0. Then the roots of the equation (x – α) (x – β) + c = 0 are a) a, c b) b, c c) a, b d) a + c, b + c
|
IIT 1992 |
02:15 min
|
|
374 |
If = x + iy then a) x = 3, y = 1 b) x = 1, y = 3 c) x = 0, y = 3 d) x = 0, y = 0
If = x + iy then a) x = 3, y = 1 b) x = 1, y = 3 c) x = 0, y = 3 d) x = 0, y = 0
|
IIT 1998 |
01:25 min
|
|
375 |
It is given that n is an odd integer greater than 3 and not a multiple of 3. Prove that  is a factor of 
It is given that n is an odd integer greater than 3 and not a multiple of 3. Prove that is a factor of
|
IIT 1985 |
07:09 min
|
