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Wavy Curve Method Part-3
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This lesson concludes the discussion on wavy curve method with advanced level examples

Vineet Loomba is teaching live on Unacademy Plus

Vineet Loomba
IITian | No. 1 Educator in IIT-JEE (Maths) | 2.6 Million Minutes Watch Time | 8+ Years Experience | Youtube: Maths Wallah | vineetloomba.com

Comments
(43)
Unacademy user
plz solve x+4/x-2<2/x+1
Keshav Kumar
a month ago
x€(-infinity,-4)U(-1,2)
Ayushi Gupta
a month ago
keshav, how did u find the factors of x^2+3x+8<0 ??
Ayushi, you make it very complicated...actually you dont have to make it into quadratic! you can write the question as (x+4)(x+1)/(x-2) 2 < 0 by cross multiplication both are positive hence we dont change its signs!! and then 2 is also getting zero so it get simply as (x+4)(x+1)/(x-2)<0 ! so now you can further solve it....and get (-infinity,-4) U (-1,2) ! :) :) :) :) :) :)
Ayushi Gupta
18 days ago
oh shit! that's vry simple. btw thnks akhilesh
Ayushi Gupta
18 days ago
but, I want to ask one more thing that if there is 1 instead of zero in rhs then how will i proceed like in this ques......4/(1+x)+2/(1-x)<1
I make one quadratic but I can not factorise that....can you send me answer if you have....it helps me to think in that way!
Ayushi Gupta
15 days ago
sure! (-infinity,-1)U(1,infinity) btw...I solved this ques. lf you'll have doubt u can ask.
thanks Ayushi.....;)
Neeraj Gupta
4 days ago
Can you give me the answer to this question? 2x - 3/x + 4 < -3
(-4 , -9/5]
Ayushi Gupta
2 days ago
yeah! right
how did the answer came bro
add 3 on both the sides...then cross multiply...you get the equation as 5x+9/x+4 < 0 then apply our rules! we can not take -4 because it makes infinity so exclude that and its less than hence we have to take negative area which is (-4 , -9/5]
sir u said the denominator part will be in open interval but you're doing it opposite. I'm confused about rule 7 .Sir, please clarify
Pilton Brahma
a month ago
okay I just got it. theory clarified, I was being clumsy sry
Vineet Loomba
a month ago
Great
sir tegnomatri ke example karbaye
Vineet Loomba
a month ago
Wo Trigonometry ke course me krvayi hue h
Sanjeev Kumar
a month ago
f{x-f{y}}=f{f{y}}+xf{y}+f{x}-1 |f{16}| ka maan
all concept clear ho gaya sir.thanks a lot.
Vineet Loomba
a month ago
Wlcm
sir plz tell me ,in wavy curve method always sign convention we choose from right hand side and in most right side we choose '+' sign , is i am right sir
Vineet Loomba
2 months ago
Yes
No sir not necessary , in whole expression if -ve sign is their like -(x-2)(x-4) then i think in wavy curve method we start plotting sign from right hand side but in this time right side we choose -ve sign ,right sir! thanks to respond please reply on my concept
Vineet Loomba
2 months ago
If u follow my method then it is always +ve on right ..
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