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(78 Posts)

By sarabjeet kaur Share

This discussion has been closed. You may post your queries in Mathematics Preparation for Engineering Entrance

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Pooja J

Posted on Aug 21, 2013 8:26 PM

In vector dot product what is (a.b)(a.c) is it a2(b.c)

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Kapil Garg

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Mridul

Posted on Aug 10, 2013 10:39 AM

A ball is bouncing elastically with a speed 1 m/s between walls of a railway compartment of size 10 m in a direction perpendicular to walls. The train is moving at a constant velocity of 10 m/s parallel to the direction of motion of the ball. As seen from the ground, (a) the direction of motion of the ball changes every 10 seconds. (b) speed of ball changes every 10 seconds. (c) average speed of ball over any 20 second interval is fixed. (d) the acceleration of ball is the same as from the train.

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Shriram

Posted on Jul 09, 2013 5:50 PM

What is the value of infinity divided by infinity? Please explain me...

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Nikhil Kumar Tripathi

The value of infinity by infinity is undefined..!! as it wil be asymptotic along both the axis..ie x and y..

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ROJA

Posted on Apr 29, 2013 10:21 PM

The length of an elastic spring is 'a' when tension is 4 N and 'b' when the tension is 5N. The length of the spring when tensionis 9N is 1) 4a - 5b 2) 5b - 4a 3) 5b + 4a 4) 5(b-a)

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Aditya

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Shalabh Kushwaha

Posted on Apr 27, 2013 12:36 PM

A and b are consecutive, positive integers such that a2−b2>22. What is the minimum possible value of a+b?

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