2,563 Answered Questions for the topic Maths

Maths

09/27/14

binomial theorem
The cube root 217 is?   how to do it with binomial expansion?
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Maths

09/27/14

binomial theorem
Find the first negative term in the expansion of (1+x)27/5 where x is a positive number.
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09/26/14

complex number
IF 1,ω+ω²+.....+ωn-1 are the nth root of unity, then the value of (1/x-1)+(1/x-ω) +......+1/x-ωn-1 =________?  
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Maths

09/25/14

maths help
Find the area of the region described by y≥ 2|x-3|+4 and x-2y ≥ -20.
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Maths

09/24/14

maths help(probability)
A well-traveled highway has its traffic lights green for 82% of the time. If a person traveling the road goes through 8 traffic intersections, finda) the probability that the firstred light occur... more
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Maths

09/23/14

maths help
the vertices of a square are z1,z2,z3,z4 taken in anticlockwise order then z3 equals 1. iz1+(1+i)z2 2.iz1+(1-i)z2 3.z1+(1+i)z2 4.(i+1)z1+z2  
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Maths

09/23/14

complex number
Let z1,z2,z3 be 3 vertices of equilateral triangle circumscribing the circle mod z =1/2. If z1=1/2+(√3i/2) and z1,z2,z3 are in anti clockwise sense then z2 is?
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09/23/14

complex number
If mod z =2, then the points representing the complex numbers -1+5z will lie on a?? 1. circle 2. straight line 3. parabola 4. ellipse
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09/23/14

complex number
If one vertex of an equilateral triangle is 1+i and centroid is it's origin then other two vertices of triangle are?
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09/15/14

Profit and Loss Based Question
Raju calculated his profit percentage on the selling price and claimed it to be 100/3.Find the actual profit percentage
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09/15/14

Profit and Loss Based Question
AMar bought an article and sold it at 37.5% profit.If he had bought it at 40 rupees more and sold it at 40 rupees less , he would have made 125/3 % loss.Find his cost price?
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09/15/14

Finding solutions to equations with the constant k? Linear algebra
Consider the system of linear equations x+ 2y =2 -x + (k-3)y +3z = −2 2x + (k+3)y + (k+3)z = 5 where k ∈ R is a constant. Determine the values of k for which the system has a unique solution,... more
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Maths

09/13/14

binomial theorem
n-1 ∑           ncr/(ncr+ncr+1) equals? r=0
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Maths

09/13/14

binomial theorem
for all natural numbers n, {(22n)*(32n)}-1-35n is divisible by???  
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Maths

09/11/14

maths help
what is the sum of abscissa and ordinate of a point P where all variable chords of the parabola y^2=8x subtend right angle at the origin , are concurrent .
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09/09/14

What is the angle between any two faces on a tetrahedron?
A tetrahedron has edges of 5cm each. What is the angle between any two faces?    Please explain how to answer this question. Thanks :)
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Maths

09/09/14

maths help
Graph the system of inequalities and classify the figure created by the solution region (e.g., triangle, trapezoid, or parallelogram).x ≤ -1y ≤ 3x + 2y ≥ -3x - 10
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Maths

09/08/14

maths help
prove that none of the integers 11,111,1111,11111,... is a square of an integer
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Maths

09/08/14

maths help
What's the answer to this differential equation if n is the nth derivative? XY^(n+1)=-ny^n
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09/07/14

Trigonometry - Area of triangles
A triangle has two sidesof 25cm and 30cm. The angle between the two sides is 30°. Find: a) the area b) the length of it's third side  c) the area using heron's formula   Answers: a) 187.5... more
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Maths

09/06/14

maths help(circles)
What is the equation of a circle, when the radius is 5 and the points pass through (3, 1) and (-2, -4)?
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Maths

09/03/14

maths help
For what value n (a^n+1 + b^n+1)/(a^n+b^n) is in Gm?
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09/01/14

by what number should 2 to the power of -1 should be multiplied to get the product as -6 to the power of -1
please answer this question as fast you can
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Maths

08/26/14

quadratic equation
Let a,b and c be real number such that 4a+2b+c=0 and ab>0 then quadratic equation ax^2+bx+c=0 has  A. real roots B.complex roots C. purely imaginary D. only one root
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Maths

08/26/14

quadratic equation
If p,q,r are real numbers satisfying condition p+q+r=0 then roots of quadratic equation 3px^2+5qx+7r=0 are
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