Theory of Equation | Descarte's Rule Of Sign | Finding Sign Of Roots

[@gajendrapurohit]

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[@ranjanjha1912]

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[@ritikadev2627]

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[@study-junction02]

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[@mohanjindal9177]

In last three examples, for 2nd example, positive roots can be 3 or 1 , as theorem gives maximum number of positive roots not exact number

[@nitikagaur1682]

One must take care of that 'no of +ve or -ve cannot exceed the number of sign change' that's the concept here.
That is if 'S' is set of all positive roots of f(x)=0 then n(S)≤ no. of sign change. Same for negative roots.
That's why we have to prove in that problem that the biquadratic eqn has 'atleat' 2 complex roots.

[@vineetbum7699]

All the video for this topic...nd the way of ur explaning are awesome...u r great sir

[@sonalisarve3664]

Very good& easiest explanation sir.👌👌👌thank you for giving this explanation.

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Hii

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I am really thankful to you sir. Sir i am study in bsc 1 year and in bsc 1 year my sir doesn't study well. So I doesn't study well in maths. But after I am see your free maths lecture I am study well in maths. At last but not least I am really thank full to you to give free maths lecture video. Thanks 🙏 you sir.

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aap normal teachers se kahi guna acha padhate ho
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[@NOMERCYGAMER1]

One million done ✅

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Thanks from BD

[@ritikadev2627]

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[@nayanrajsinghshaktawat1481]

Splendid lecture

[@mahendrasonker456]

Very Nice. Excellent.

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👌👌😃😃

[@piyushanjana5796]

thanks to you sir...i am prearing jee adv and i struct at these kind of question but found this video...so helpfull❤️

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Sir itni asani se samjhaya 😃, equation dekh ke kitna dar lagta hai... Lekin aap ke samjhane par easy ban geya😇

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hats off my legend.. mazaa aa gya sur

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Achha explain kiya sir aapne 👍👍

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Time saving ❤️...earned one more subscriber

[@adityakumarsingh2131]

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[@deepakrao8860]

Your are very well explained sir. Thank you 🙏🙏

[@sibampaul7257]

it's very helpful for me ❤❤❤❤❤

[@Krish_202]

Sir in equation like f(x) = x² + 4x + 5 . How do I know the roots are positive real or negative by Descartes theorem because there's no change in f(x) or f(-x)

[@vandanathakur8701]

🙏thank you sir

[@kavitaraghuwanshi2106]

Thanks for uploading such vedios, very helpful

[@manjumeher]

Sir Descartes method of finding roots per v video bna dijiye 🙏

[@ThECLiPs08]

Sir it was so easy or you made it ... whatever it is ... thank you sir with my full heart😁😁🙏🙏

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*video

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Sir aap bahut achha padhate ho

[@indian1747]

Ur explanation nd teaching techniques are wonderful sir💯💯
But please improve ur 📷 quality
Anyways thnk sir👍👍

[@SleepyBoat-xj3pv]

Nice explanation sir❤❤❤❤

[@heeraksharma1224]

In last example, there will be exactly 2 imaginary roots as imaginary roots always occur in conjugate pair.

[@deepakprajapati7228]

U r right

[@NotGodvalo]

@@deepakprajapati7228 ahh, adhi adhuri knowledge. pair matlab 2-2 ke grp. toh 4 imaginary roots matlab 2 pair. sahi toh hai. pair mei hi toh a rhe hai. zaruri nhi ki ek hi pair ho

[@Chandangiri8134]

Wrong concept. ...there have not explain about variation of signs in the sequence of coefficients. .....

[@mdmohidulislam8990]

Most helpful class
Thanku sir

[@Amjadkhan-gi4tu]

Mashalla so clear it was in understanding the Descartes rule

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Thanks for solving this pblm.

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Sir aap bhut bhut bhut achha pdhate ho
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Much knowledge in less time
Great effort is done to make this video

[@vineetbum7699]

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Thanku so much sir 🙏

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It was really helpful for me too

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Thank you sir ... for your helpful explained

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Hi

[@dhananjaysahani4470]

Nice way of teaching. Thanks a lot sir

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Isme koi exception nhi kya ? Ye rule har que mei apply kr skte hai?

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thank you sir ..

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Helpful vdo sir 🙏

[@hariom5133]

You teach very well and thank u

[@IndianGamer-qz8lf]

The video was great, but many times the audio didn't match the content.
Sir kept on saying +, -, + but on the board it was written +,-,-
Sir also said roots are 5 and -4, but then wrote 5 and -1.
I know these are very minute mistakes, but they confused me very much.

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Agree

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You are preparing for BSC Mathematics 1st year

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Tq sir for making this video

[@JaiShreeRam211.]

Amazing concept😐

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Thank you

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Thanks for the class sir

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Really good teacher 👏

[@puneetrana4291]

9:12 , In the explanation, you should use at least or at most terminology. Descartes never tells us an exact number of +,- or complex roots.

[@srvplwl]

right

[@Harshitsamrat]

Wahi to yar koi bhi padhane AA jate hai ajkal

[@millionbillion28]

Yepp.... Max no. Batata hai....

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Thanks Sir 🧡

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Sir can we use discardes rule in trigonometric functions????

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Sir thoda jld upload kre video plz.... daily one topic....

[@ayanbanerjee1379]

sir please upload a video on sturm's method

[@talhakhan-kx5qo]

I am amazed that no one is pointing that the complete video is wrong as it is partial information. the rule just says about the maximum no.of positive and negative roots the equation can have. the teacher has taken the maximum no.of roots as actual roots and have not considered other possibilities. the video and information in incomplete and wrong.

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sir please upload a lecture on sturms function

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Tysm sir🌺

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Newton method for integral root ye video nhi h kya?

[@Wingsindigo883]

Sir meri ek query h...
X³-18x-35=0 ek equation hai...iske roots x=5 , x=(-5+i√3)/2 , x=(-5-i√3)/2 hain....one real root and two complex roots...
But jab hum Descarte's rule of sign apply kr rhe hein to yeh f(-x) ke liye two negative real roots bta raha h..jabki asliyt m iske pass 2 complex roots hein...plzz sir mere iss doubt ko clear kijiye

[@study-junction02]

Bhaiya rule ko dhyan se apply kre
Is ques me Rule ye khta h ki max no. of -ve roos is 2 , lekin aesa nhi khta ki definitely 2 -ve roots honge
Here no. of -ve roots can be : 0or1or2
Hope you get it 🙏

[@aryanshrraghuwanshi]

I think no. of positive roots(or negative) will be no of tikes sign changes or less than it by multiples of even no.
Btw thanks sir, I wanted this for my Jee advanced paper.

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Your explanation is really good and
It is useful for so many students
You are doing really a excellent work
Thank you....

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Thanks a lot

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Great!