Recent questions tagged jee mains

+1 vote

1 answer

If (x + iy)^3 = u + iv, then show that u/x + v/y = 4(x^2 – y^2)

asked Apr 6, 2019 in JEE by kratos

+2 votes

1 answer

When did india play its first complete test series of 3 test matches and against which team and which field and their captain?

asked Mar 29, 2019 in JEE by kratos

+3 votes

1 answer

Find the distance between P (x1, y1) and Q (x2, y2) when : (i) PQ is parallel to the y-axis, (ii) PQ is parallel to the x-axis.

asked Mar 28, 2019 in JEE by kratos

+3 votes

1 answer

If sinx=3÷5, cosy=-12÷13, where x and y both lie in second quadrant find the value of sin(x+y)

asked Mar 18, 2019 in JEE by kratos

+2 votes

1 answer

Which of the following are Aprotic acids?

asked Mar 12, 2019 in Class 12 by kratos

+1 vote

1 answer

For how many integral values of n is, n^2+7n+14 is a perfect square of an integer?

asked Mar 11, 2019 in JEE by kratos

+3 votes

1 answer

Find a positive value of m for which the coefficient of x^2 in the expansion (1 + x)^m is 6.

asked Mar 7, 2019 in JEE by kratos

+1 vote

1 answer

L be a line 2x+y=2 .If the axes are rotated by 45 degrees then find the intercepts made by the line on the new axes.

asked Mar 6, 2019 in JEE by kratos

+3 votes

1 answer

The coefficients of the (r – 1)th, rth and (r + 1)th terms in the expansion of (x + 1)^n are in the ratio 1 : 3 : 5. Find n and r.

asked Mar 5, 2019 in JEE by kratos

+2 votes

1 answer

Without using distance formula, show that points (– 2, – 1), (4, 0), (3, 3) and (–3, 2) are the vertices of a parallelogram.

asked Mar 3, 2019 in JEE by kratos

+1 vote

1 answer

If a plant is releasing CO2 and taking in oxygen during the day, does it mean that there is no photosynthesis ? Justify your answer.

asked Feb 28, 2019 in JEE by kratos

+2 votes

1 answer

What will be the sign of sin1.sin2.sin3 ? (positive or negative). Please explain.

asked Feb 26, 2019 in JEE by kratos

+2 votes

1 answer

Why do fishes *** when taken out of water?

asked Feb 24, 2019 in JEE by kratos

+2 votes

1 answer

How many words, with or without meaning, each of 2 vowels and 3 consonants can be formed from the letters of the word DAUGHTER ?

asked Feb 22, 2019 in JEE by kratos

+3 votes

1 answer

Explain the concept of parabola and hyperbola.

asked Feb 21, 2019 in JEE by kratos

+3 votes

1 answer

Let f = {( x, sqr(x)/1+sqr( x)) : x x08x03 x04 Î R} be a function from R into R. Determine the range of f.

asked Feb 18, 2019 in JEE by kratos

+3 votes

1 answer

If a + ib = (x + i)^2/(2x^2 +1), Prove that a^2 + b^2 = (x^2+1)^2/(2x^2+1)^2

asked Feb 14, 2019 in JEE by kratos

+3 votes

1 answer

If A1, A2 are two AMs between two numbers a and b, then express (2A1-A2)(2A2-A1) in terms of a and b.

asked Feb 9, 2019 in JEE by kratos

+3 votes

1 answer

Find the value of x for which the points (x, – 1), (2,1) and (4, 5) are collinear.

asked Feb 7, 2019 in JEE by kratos

+3 votes

1 answer

Explain what happens to the level of water when an ice containing an iron ball melts in water?

asked Feb 7, 2019 in JEE by kratos

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