1bhaiya,
can u plz see ur mail box
341Maybe you are looking for http://www.targetiit.com/iit-jee-forum/posts/similar-to-aragorns-34-how-mnay-times-63-34-1170.html
1sorry...jagaran...for the comments....but at least u should've put ur heart & soul into the sum. It makes things better.
Well the 2nd one.....I'm finding 2 solns.
2logx=xlog2
xlog x = 2log 2
Now, by comparing we can easily say,...that one val. is 2.
Next, try this :
log 4 = 2 log2
Now to equate lhs with rhs there should be a 2x2 in the numerator.
Hence, 4 is satisfied.
now, with 3 and so on it is not working as :
suppose log 32 is denominator....then for numerator...
there must be 3x2=6 which is less than 32
For further values , numerator is constantly decreasing w.r.t val. of x in the denominator.
Hence it's coming to 2,4....and i'm an idiot that I can't find the 3rd soln.
By the way sorry for saying it easy but... which chapter's question is this ?
24Here is the link....
http://www.targetiit.com/iit-jee-forum/posts/solve-197.html
Nice explaination by Abhishek Priyam
1
the graph will intersect at three places hence three solutions....sorry i had misjudged the question at first galnce
24
eureka123
·2009-09-07 10:36:34
@jagran..ur Q2 was done abt 10 months back here...if I remeber correctly..
1want to make one thing clear i had no clue about the first question someone shouldn't call it 'easy' people are here to help others and be helped
1
Jagaran Chowdhury
·2009-09-07 10:31:17
hint --- one solution is 4 prove it atleast
1
Bicchuram Aveek
·2009-09-07 10:09:18
12 = sin 30°
√32=cos 30°
sin230° + cos230° = 1
Hence x= 2
1
Jagaran Chowdhury
·2009-09-07 10:26:56
second one the so called "easy one"
1
Jagaran Chowdhury
·2009-09-07 10:26:05
@ arshad what about the other two solutions find them
1
Arshad ~Died~
·2009-09-07 10:25:30
which question has 3 solutions 1st one or second one?
1
Jagaran Chowdhury
·2009-09-07 10:22:49
@ arshad show the steps no trials and errors it has three solutions
1
Jagaran Chowdhury
·2009-09-07 10:22:04
u solve it brother and u will find it impossible
1
Arshad ~Died~
·2009-09-07 10:20:52
take log both sides and solve....
ans will come out to be x=2...
another easy one
1
Jagaran Chowdhury
·2009-09-07 10:17:28
@aveek was it easy??? then solve this(without trial and error method)
x2=2x
