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Ask QuestionPosted by ❤️ Nitya ❤️ 6 years, 4 months ago
- 8 answers
Posted by Prakati Sharma 6 years, 4 months ago
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Posted by Adi Pandey 6 years, 4 months ago
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Ã.P.W.B.Đ ⚡ 6 years, 4 months ago
Posted by Creative Job With Parth 6 years, 4 months ago
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Posted by Sangita Ramesh 6 years, 4 months ago
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Posted by Dk Singh 6 years, 4 months ago
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Ram Kushwah 6 years, 4 months ago
Sn=3n×3n - 4n=9n^2-4n---------------- (1)
putting n-1 in place of n
Sn-1=9(n-1)(n-1)-4(n-1)
=9n^2-18n+9-4n+1
Sn-1=9n^2-22n+10-------------------------(2)
We know that
Sum of n terms = sum of n-1 terms + an
Sn=Sn-1 + an
an=Sn-Sn-1
Putting value of Sn and Sn-1
an=9n^2-4n - (9n^2-22n+10)
=9n^2-4n-9n^2+22n-10
=18n-10
Hence an=18n-10
Posted by Patnam Roopa Patnam 6 years, 4 months ago
- 0 answers
Posted by Ishika Yadav 6 years, 4 months ago
- 2 answers
Harsh Mishra 6 years, 4 months ago
Well, don't mind.... but may i know, from where you got this question ???
Well, the answer will be :-
The given series is 5+(-41)+9+(-39)+..+(-5)+81+(-3).
This is consisting of two AP's.
S1=5+9+13+....+77+81, where a=5, d=4
S2=−41−39−37−...(−3), where a=−41 and d=2
for S1, 81=5+(n−1)×4 ⇒ n−1 =764, hence n=20
S20 = 202×[5+81]
=10×86 = 860 for S2, −3 = −41+(n−1)×2 ⇒ n−1 = 382,
Hence, n=20
S20 = 202×[−41−3] = −10×44 = −440
Total sum=S1+S2 = 860−440 = 420
Therefore, Answer = 420.
Posted by Yogesh Purohit 6 years, 4 months ago
- 2 answers
Posted by Kamini Sisodia 6 years, 4 months ago
- 4 answers
Rishu Kumar 6 years, 4 months ago
Harsh Mishra 6 years, 4 months ago
So, the answer looks like :-
We have,
x² + 7x + 10
= x² + 2x + 5x + 10
= x(x+2) + 5(x+2)
= (x+2)(x+5) , i.e., X = -5 or -2
Harsh Mishra 6 years, 4 months ago
<a>Abhijeet Singh </a>
Here,we have x²+7x+10 x²+2x+5x+10 x(x+2)+5(x+2) (x+2)(x+5)
Bhai, Equal ka sign bhee laga diya karo.....:)
Abhijeet Singh 6 years, 4 months ago
Posted by Aadya Singh 6 years, 4 months ago
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Posted by Tarun Vats Vats 6 years, 4 months ago
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Shahin Parveen 6 years, 4 months ago
Posted by ❤️ Nitya ❤️ 6 years, 4 months ago
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Posted by Sanya Chawla 6 years, 4 months ago
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❤️ Nitya ❤️ 6 years, 4 months ago
Posted by ❤️ Nitya ❤️ 6 years, 4 months ago
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Tannu ? 6 years, 4 months ago
Deepanshu Sharma 6 years, 4 months ago
Honey ???? 6 years, 4 months ago
Posted by Rajvir Kaur 6 years, 4 months ago
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Shahin Parveen 6 years, 4 months ago
Posted by Aishwarya Sharma 6 years, 4 months ago
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Deepanshu Sharma 6 years, 4 months ago
Deepanshu Sharma 6 years, 4 months ago
Posted by Rahul Shah 6 years, 4 months ago
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Posted by Jay Anth 6 years, 4 months ago
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Ram Kushwah 6 years, 4 months ago
Applying Division lemma on 210 and 66
210=66*3+2-----------(1)
Applying Division lemma on 2 and 66
66=2*33+0
Here remainder is zero
so HCF(66,210)=2
Now from(1)
2=210-3*66
HCF=210*1-3*66-----------------(2)
Given HCF=210x+66y-------------(3)
Comparing (2) and (3) we get
x=1 and y=-3
Hence HCF=210*1-3*66
Posted by ❤️ Nitya ❤️ 6 years, 4 months ago
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Posted by Abhay Pandey 6 years, 4 months ago
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Rani Mishra ??? 6 years, 4 months ago
Rani Mishra ??? 6 years, 4 months ago
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Ananya Aggarwal 6 years, 4 months ago
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Gungun ?? 6 years, 4 months ago
1Thank You