hi,

i dont know what to do .i am preparing for iit-jee 2008 (passed from class 11 th).

i am a student of brilliant tutorial.i have recentely given my phase test.

 

talking about the past, i skipped few module test(quaterly test),scored average marks in other module test due to my regular scooling exams.

But ,for the phase test i worked hard and got a good percentile.i thought that i will be in 1st batch but i was given batch 2nd due to my previous record.

 

now , i feel like its all waste. my preparation ,my future. i dont feel like studying.

i lost my hope that i may get selected in iit.

i dont feel like doing anything.

 

 

 

hi,

 

if options are provided

you need to understand that the more bigger the dc the more terms will cancel out,so by looking at the options make out which terms are not present,

concentrate on removing that term(s) or its dc.

IN A TRIANGLE OF BASE "a" THE RATIO OF OTHER TWO SIDES ARE  b\c=r (where r<1) we have to prove that altitude of the triangle "P"

IS :

 

 

 

P<=ar/(1-r²)

HI ,              

 

 

i am studying in 11th class.generally we have to make a project on c++ (eg: railways , library etc) in 12th class but my teacher has asked me to submit my project so as to modify it in 12th class to ease my work.

 

but i cant understand complex programs , linking etc . so anyone studying in class 11th or 12th class who can help me kindly send some sample work to

 

 

thanks

 

 

 

 

 

 

 

 

india plays 4 matches with aus and west indies . the probability that india will get 0,1,2 points in a match are .45 , .05  , .50  resp. Find Probability that india gets at least 7 points (in total 4 matches).

(PLEASE EXPLAIN THE ANSWER    )

i will solve it as soon as you can prove it for

 

y= x² +x

 

 

 

thanks

one day i saw an article written on black holes.it was written that "

light could not escape because THE ESCAPE VELOSITY OF A PARTICLE INCREASES WITH DECREASE IN ITS SIZE   but this concept contradicts the formula which is independent of mass of particle.

 

 

 

let us consider the case of selecting a sign(+ve/-ve)

out of + - + - ....+ where total signs are 17.

but nou 17^th sign(as it will become consicutive)

similarly we select people

 

therefore answer should be:

 

= 2  *  ⁸c₇

let the people sitting be in sequence + - + - + - + -.............+

 

so basically we have to select 7 signs (positive egative)out of respective number.

 

therefore answer should be ⁸c₇+⁸c₇

 

 

go to this link

Find the set of values for which the equation

 

(x²+x)² +a(x²+x)+4=0      has 4 distinct roots.

 

hints:

 

use by taking x²+x=t 

also

t²+a+4=0 {use quadratic to find restrictions on t }