Recent content by nirajnishad

  1. N

    Solving Quadratic Equation: (a+b+c)^2

    Homework Statement if roots of the equation ax^2+bx+c=0 be the form of p/(p+1) and (p-1)/p,the the value of (a+b+c)^2 is? Homework Equations The Attempt at a Solution
  2. N

    Motin in two dimensions,accelerated motin,motions

    please anyone can give me some hint to solve this question?
  3. N

    Motin in two dimensions,accelerated motin,motions

    Homework Statement The Acceleration of a particle increases linearly as bt with time.If the particle starts from U as initial velocity then the distance traveled in t seconds will be? Homework Equations The Attempt at a Solution
  4. N

    Solve Set Logic Homework: A∩B

    Homework Statement X={n/n belongs to N,X>=4} B={x belongs N/ x<5} Homework Equations then, A intersection B=________
  5. N

    X,Y are polynomials of n, and n is an element of N, then

    Homework Statement X={4^n-3n-1/ n belongs to N} Y={9(n-1)/ n belongs to N } Homework Equations then, XUY is equals to X or Y or N or None of these
  6. N

    Set theory - set builder notation

    Homework Statement X={8^n-7n-1/n belongs to N} Y={49(x-1)/x belongs to N} Homework Equations Then, x is subset of y ] or y is subset of x or x=y,none of these
  7. N

    Find the sum of first 28 terms?

    i tried but after soving the equations, value of d is coming in fraction.and the common difference cannot be a fraction number
  8. N

    Find the sum of first 28 terms?

    Homework Statement sum of first 11 terms of Ap is 17 and sum of first 17 terms is 11 find the sum of first 28 terms?Homework Equations Sum=n/2[2a+(n-1)d]The Attempt at a Solution i tried solving it by using obove formula but i am not able to do so as the value of d is coming in fraction
  9. N

    How to Solve a Kinematics Equation for a Dropped Ball from a Balloon?

    Homework Statement A ball is dropped from a balloon going up at a speed of 7 m/s. If the balloon was at a height 60 m at the time of dropping the ball, how long will the ball take in reaching the ground ? Homework Equations u = –7 m/s, s = 60 m, a = g = 10 m/s^2 The Attempt at a...
  10. N

    What does the slope of a speed vs. time graph represent?

    it will be acceleration because as the time will pass the speed increases or decreases as it is a slope n as there is only 1 slope so average acceleration? i don't think so... i'll go for acceleration
  11. N

    Solving Motion & Speed Homework Problem with X, u and a

    Homework Statement A stone is droped from a balloon going up with a uniform velocity of 5m/s.if the balloon was at 50m high when the stone was dropped, find its height when the stone hits the ground? find the time for X(distance)=-50m, u(initial velocity)=5m/s a(acceleration)=-10m/s*s...
  12. N

    Is there any other method to solve this determinant?

    Homework Statement Row-1...a 1 1 Row-2...1 b 1 Row-3...1 1 c if the value of the determinant is positive the what is abc? Homework Equations ans is abc>-8 The Attempt at a Solution I am not able to follow the method shown in R D sharma Book. Is there any other method to...
  13. N

    Solving a determinant to give it's factors

    i have tried adding all rows and colums. after doing it ,i am unable to find any common factor in any row or coloumn
  14. N

    Solving a determinant to give it's factors

    Homework Statement I have a determinant to solve. Fistrow is -2a, a + b, a+c Second row is b + a, -2b, b + c Third row is c+a, c+b, -2c Prove that the determinant is equal to 4 (b +c) (c +a) (a + b) Homework Equations Not applicable. The Attempt at a Solution I have...
  15. N

    Calculating Moles of MgIn2S4 from Given Masses of Mg, In, and S

    I'm sorry for the misleading title of the thread. It should be finding the number of moles!