JEE Mains Maths – india vidya

Comprehension: In a triangle ABC, the coordinates of the vertices are A= (1, 2), B = (4, 5) and C = (2, 8). The points D, E and F are the mid-points of the sides BC, CA and AB respectively. The points P, Q and R are the feet of the altitude from A, B and C to the sides BC, CA and AB respectively.

Now, answer the following questions

1. The equation of the line parallel to DE and passing through A is
A) 2x – y = 0 B) 3x + 2y = 7
C) 2x + 5y = 12 D) None

2. The equation of the line AP is
A) 3x + 2y = 7 B) 2x − 3y = 5
C) 2x − 3y + 4 = 0 D) 3x + 2y = 8

3. The equation of the median CF is
A) 9x + y = 10 B) 18x + 2y = 15
C) 2x − 7y = 10 D) 9x + y = 26

Comprehension: The vertices of a triangle are the points A(p, p tanα) B(q, q tan β) and C(r, r tan γ) where α + β + γ = π. The circumcentre is at the origin and the orthocenter is H(x, y).

4. The coordinates of the vertex ‘A’ If ‘R’ is the circumradius of the ΔABC.
A) (R sin α, R cos α)
B) (R cos α, R sin α)
C) (R cos α/2, R sin α/2)
D) none of these

Comprehension: A(3, 0), B(6, 0) are two fixed points and U (α, β) is a variable point on the plane. AU and BU meet the y-axis at C and D respectively, and AD meets OU at V.

5. The equation of CV always passes through
the point for any position of U in the plane
A) (3, 0) B) (2, 0) C) (6, 0) D) (4, 0)

Comprehension: A cylinder is inscribed in a sphere of radius R. The volume V of the cylinder is written as V = f(x), where x is the height of the cylinder.

6. The function V/x represents
A) a straight line B) an increasing function
C) a circle D) a decreasing function

Comprehension: The complex number z satisfying the condition z-25i| ≤ 15 represented by the points in side and on the circle of radius 15, centre (0, 25) and the complex number having least positive
argument and maximum positive argument in this regions are the points of contacts of tangents drawn from the origin to the circle.

7. The complex number z having least positive argument
A) -12 + 6i B) 12 + 6i C) -12-6i D) none

8. The complex number z having least modulus
A) 40i B) 20i C) 25i D) 10i

Comprehension: Suppose z and w be two complex numbers. Such that |z| ≤ 1, |w| ≤ 1 and |z + iw| = |z – iw| = 2. Use the result |z|2 = z z and |z + w| ≤ |z| + |w|.

9. Number of complex numbers z satisfying the above conditions is
A) 1 B) 2 C) 4 D) none.

KEY
1) D 2) C 3) D 4) B 5) B 6) D 7) D 8) D 9) D.

Following are some model questions for JEE (Main) examination. The Mathematics questions along with key / answers are given below for practice.

1. If the sum of the distance of a point from two perpendicular lines in a plane is 1. Then its locus is
A) square B) circle C) straight line D) two intersections lines

2. The points (-a, -b), (0, 0), (a, b) and (a2, ab) are
A) collinear B) vertices of rectangle
C) vertices of parallelogram D) none of the above

3. The straight lines x + y = 0, 3x + y – 4 = 0, x + 3y – 4 = 0 form a triangle which is
A) isosceles B) equilateral C) right angled D) none

4. The point of intersection of the right bisectors of the sides AB and AC is at the minimum distance from the side BC, then the triangle is
A) equilateral B) scalene C) isosceles D) right angled

5. The equation of the straight line belonging to both the families of lines given by
x(l+4)+y(10-3l)=18-l and x(1+2m)- (1+m)y+1-2m = 0 is
A) 3x-y-5 = 0 B) 2x-3y-1 = 0
C) x+5y-23 = 0 D) 3x-y+10 = 0

6. If [x] denotes the integral part of x, then the
domain of f(x) = cos-1(x + [x]) is
A) (0,1) B) [0,1) C) [0,1] D) [-1,1]

7. A rectangle PQRS has its side PQ parallel to the line y = mx and vertices PQ and S on the lines y = a, x = b and x = -b respectively. The locus of the vertex R is
A) (m2-1)x+my+b(m2+1)+am = 0
B) (m2-1)x-my +b(m2+1)+am = 0
C) (1-m2)x-my+b(m2+1)+am = 0
D) none of these

8. All points lying inside the triangle formed by the points (1, 3) (5, 0) and (-1, 2) satisfy
A) 3x + 2y ≤ 0
B) 2x + y – 13 ≥ 0
C) 2x – 3y – 12 ≤ 0
D) -2x + y ≥ 0

9. If f(x) is a continuous and differentiable function and f(1/n) = 0 ∀ n ≥ 1 and n ∈ I, then
A) f(x) = 0, x ∈ (0, 1]
B) f(0) = 0, f ′(0) = 0
C) f ′(x) = 0 = f ′′(x), x ∈ (0, 1]
D) f(0) = 0, f ′(0) need not be zero

10. If y = f(x) and x cos y+y cos x = π then f ′′(0) is
A) 1 B) − 1 C) π D) −π

11. If f(x − y) = f(x) . g(y) − f(y) . g(x) and g(x − y) = g(x) g(y) + f(x) . f(y) ∀ x, y ∈ R. If right hand
derivative at x = 0 exists for f(x) then g′(x) at x = 0 is
A) 0 B) 1 C) − 1 D) doesn’t exist.

KEY: 1)A 2)A 3)A 4)D 5)A 6)B 7)B 8)C 9)B 10)C 11)A

JEE Main Maths Comprehension Type Questions with Key

JEE Main Mathematics Model Questions with Key