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  • 1 answers

Mahi Mishra 3 years, 6 months ago

If α and β are the zeros of the quadratic polynomial f(x)=ax2+bx+c, then evaluate α−β sum of zeros =α+β=a−b​ product of zero =αβ=ac​ Moreover, we have (α−β)2=(α+β)2−4αβ a2b2​−a2c2​ ⇒ α−β=a±b2−c2​​
  • 1 answers

Vikhyat Wahi 3 years, 6 months ago

Sn = 180 n/2 [90 + (n - 1)(-6)] = 180 90n – 6n2 + 6n = 360 ⇒ 6n2 – 96n + 360 = 0 ⇒ 6[(n – 6)(n – 10)] = 0 ⇒ n = 6, n = 10 Sum of a7, a8, a9, a10 = 0 ∴ n = 6 or n = 10
  • 2 answers

Megha Soni 3 years, 6 months ago

A3 = 16 A7 - A5 =12 A+6d -A+4d =12 By elimination:- 2d =12 D = 12/2 D=6 answer Hope it helps.....

Pragathi K.V. 3 years, 6 months ago

A3 = 16 A7 - A5 = 12
  • 1 answers

Megha Soni 3 years, 6 months ago

Value of k square. Roots of equation by quadratic formula. SN An Volume of shapes TSA of shapes Mode Case study may be formed from chapters 9 and 13. Tangent prove Median. These are the questions which were also discussed in the video by dear sir. I am providing you the link of the YouTube channel https://youtube.com/c/DearSir
  • 1 answers

Vikhyat Wahi 3 years, 6 months ago

All formula's given in the all chapters are important, Mainly all AP formula and Statistics
  • 1 answers

Vedant Suryawanshi 3 years, 6 months ago

-0.94
  • 1 answers

Mukunth P 3 years, 6 months ago

(n/2)th and( n/2+1)th observation
  • 1 answers

Megha Soni 3 years, 6 months ago

The surface area of the cube is 6a square. Let the dimension of one cube be a=2 Then the surface area of one cube will be 24cm. If we talk about the surface area of three cubes together then it will be 24+ 24 +24= 72 cm all together. 72 cm is the required answer to this question. Hope it helps
  • 1 answers

Megha Soni 3 years, 6 months ago

So? Apna question complete likha kro ya phir uski pic dal diya karo.
  • 1 answers

Ravjot Kaur 3 years, 6 months ago

AP : 2,4,8,16 is not in ap Because the difference is not common D=4-2=2 D=8-4=4 D=16-8=8
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  • 1 answers

Vedant Suryawanshi 3 years, 6 months ago

asquare +2ab+ bsquare
  • 1 answers

Aparna Bhamare 3 years, 6 months ago

let 1/3+3√2 be a rational number 1/3+3√2 = a/b [ where b is not equal to zero] Rationalize the denominator, 1/3+3√2= 3-3√2 / 3-3√2 = 3-3√2/ (3)² - (3√2)² -(3-3√2)/ 9 = a/b -3 + 3√2 = 9a/b 3√2 = 9a+ 3b/b √2 = 9a + 3b/3b we know that √2 is irrational Irrational is not equal to rational . therefore, 1/3+3√2 is irrational Hope that my answer helps...
  • 1 answers

Madhuparna Saha 3 years, 6 months ago

90 and -30
  • 2 answers

Tanishq Pratap Chauhan 3 years, 6 months ago

- coefficient of x/ coefficient of x²

Ayushman Singh 3 years, 6 months ago

-B/A
  • 4 answers

Aryan Mandloi 3 years, 6 months ago

15

Muskan Sharma 3 years, 6 months ago

an = 3n-2n =} a1 = 3(1)-2(1) =} a = 1 =} Similarly, a2 = 2 , a3 = 3 =} AP = 1,2,3,.... =} Sn = n/2[2a+(n-1)d] =} 15/2[2(1)+(15-1)1] =} 120

Nivetha .A 3 years, 6 months ago

120

Dheeraj Agarwal 3 years, 6 months ago

3
  • 1 answers

Dheeraj Agarwal 3 years, 6 months ago

x=10-4y ÷ 3 x=2+2y ÷2 this equation and then solve
  • 2 answers

Vedant Suryawanshi 3 years, 6 months ago

1)1059=2*399+261 2)399=1*261+138 3)261=1*138+123 4)138=1*123+15 5)123=15*8+3 6) 15=3*5+0 °° HCF(1059,399)=15

Himan J 3 years, 6 months ago

1)1059=2*399+261 2)399=1*261+135 3)261=1*135+126 4)135=1*126+9 5)126=14*9+0 °° HCF(1059,399)=9
  • 1 answers

Himan J 3 years, 6 months ago

3✓5
  • 0 answers
  • 1 answers

Muskan Sharma 3 years, 6 months ago

=4x+9y=1/2 .....(1) = 12x+12y=1 =} 12(x+y)=1 =} x+y=1 =} x=1-y .....(2) By putting eq. (2) in (1) :- 4(1-y)+9y=1/2 =} y = -7/10 = x = 1-y =} x= 17/10
  • 1 answers

Luckey Saxena 3 years, 6 months ago

867and 225
  • 2 answers

Dheeraj Agarwal 3 years, 6 months ago

father's age x and children age y so father's age is twice of children age. therefore fathers age 2x and children age 2 (2y)=4y

Surya S 3 years, 6 months ago

If the age of a grand child is x yrs, let us assume there are two children, then the father age would be 2x. when the father is 2x,then grand father age is twice the father so, 2(2x) = 4x.
  • 0 answers

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