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#26 Re: Help Me ! » factorial sum » 2012-04-30 07:47:43

juantheron

thanks bob and anonim

but how can i get

#27 Help Me ! » factorial sum » 2012-04-30 06:36:20

juantheron
Replies: 4

consider a function

  on non-negative integers such that
 

and

  for

Then show that gif.latex?\displaystyle%20\frac{f(n)}{n!}%20=%20\sum_{k=1}^{n}\frac{(-1)^k}{k!}


Answer given in Book is Like this way

So

But I did not Understant Second line

Thanks

#28 Help Me ! » Probability of no. » 2012-04-28 20:02:15

juantheron
Replies: 11

3 no. are choosen from {1,2,3,..........,8} with replacement, Then find the probability that min of choosen no. is = 3

Given that max. of choosen no. is  = 6

#29 Re: Help Me ! » complex no » 2012-04-28 14:57:41

juantheron

Thanks  anonimnystefy Got it

Let

be the roots of Given Equation

Now all Roots are Imaginary and lie on

and Imaginary Roots are always occur in pair

so Let

and

Similarly 

and

Now Using Vieta, s Formula


So

So

because

#30 Help Me ! » complex no » 2012-04-28 14:39:17

juantheron
Replies: 4

Let a,b,c,d be real numbers. Sauppose that all the roots of the equation z^4 + az^3 + bz^2 + cz + d = 0 are complex numbers

lying on the circle |z| = 1 in the complex plane. The sum of the reciprocals of the roots is necessarily:

options;

a) a

b) b

c) -c

d) d

#31 Re: Help Me ! » non singular matrices » 2012-04-28 14:38:05

juantheron

Thanks Bob I am trying to understant it

To bobbym  How can we get it

To anonimnystefy how can we find total no. of matrices using 4 (1,s) and rest all zero

Thanks

#32 Re: Help Me ! » no of integers » 2012-04-28 14:28:51

juantheron

edited

#33 Help Me ! » no of integers » 2012-04-28 14:22:22

juantheron
Replies: 33

How many integers from  to 1 to 10^6  ( both inclusive ) are neither perfect squares nor perfect cube nor perfect fourth powers

#34 Re: Help Me ! » non singular matrices » 2012-04-28 07:10:55

juantheron

Thanks Bob

I want more explanation

#35 Re: Help Me ! » players game » 2012-04-28 06:55:05

juantheron

Thanks gar explanation required

#36 Help Me ! » players game » 2012-04-28 05:33:37

juantheron
Replies: 3

2 players  A and B play a series of 2n games. Each game can result in either a win or a loss for A. Find the total no. of ways in which A can win the series of these games. (All the games are to be played)

#37 Help Me ! » non singular matrices » 2012-04-28 05:28:50

juantheron
Replies: 45

The no. of 3×3 non - singular matrices matrices, with four entries as 1 and all other entries as 0

#38 Help Me ! » determinants » 2012-04-23 06:25:05

juantheron
Replies: 1

13352053566926.jpg

#39 Re: Help Me ! » Probability » 2012-04-23 05:25:42

juantheron

Thanks bobbym got it

#40 Re: Help Me ! » ranfe of function » 2012-04-23 05:19:29

juantheron

(2) Let

Using Triangle Inequality

Where

So

equality hold when

So

So

at

So

#41 Help Me ! » Probability » 2012-04-22 13:44:54

juantheron
Replies: 18

GIVEN:   The Largest number of ways in which 6 persons each throwing a single dice once make a sum of 17 is n. Then find [n/1000]

where [.] is the Greatest integer function

#42 Help Me ! » distribution of balls » 2012-04-14 20:04:18

juantheron
Replies: 7

the number of ways of distributing 10 identical balls in 4 distinct boxes such that no box is empty......give proper explaination plz

#43 Re: Help Me ! » Probability » 2012-04-08 01:26:30

juantheron

Yes Bobbym , but would you like to explain it plz

#44 Re: Help Me ! » Maximumvalue » 2012-04-08 01:07:08

juantheron

Thanks Moderators, but I want explanation for that answer

Thanks

#45 Re: Help Me ! » permutation » 2012-04-08 01:05:26

juantheron

but bobbym I didnot understand how we multiply Coeff. of x^5 by 120

#46 Re: Help Me ! » permutation » 2012-04-08 01:02:26

juantheron

Thanks Bobbym and Bobbundy .

ans = 150

#47 Help Me ! » Probability » 2012-04-08 01:01:18

juantheron
Replies: 9

4 fair dice

, each having  six faces numbred
are Rolled simultaneously

.The Probability that

shows a number apperaring on one of
and
is

#48 Help Me ! » Maximumvalue » 2012-04-07 21:53:54

juantheron
Replies: 15

Maximum value of function

where

#49 Help Me ! » permutation » 2012-04-07 21:51:23

juantheron
Replies: 13

The Total no. of ways in which

balls of Different Color can be Distributed among
persons

so that each person gets at least one balls is

#50 Help Me ! » remainder » 2012-02-15 23:50:03

juantheron
Replies: 3

If 

is divided by
then the remainder is
, when
is divided by
remainder is
. what is the remainder when
is divided by
.

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