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Saksham Hinge 1 day, 18 hours ago

Let 1 s t term of A . P = a and common difference = d We have to prove that S 12 = 3 ( S 8 − S 4 ) S 12 = 12 2 [ 2 a + ( 12 − 1 ) d ] S 8 = 8 2 [ 2 a + ( 8 − 1 ) d ] S 4 = 4 2 [ 2 a + ( 4 − 1 ) d ] Now, R . H . S = 3 ( S 8 − S 4 ) = 3 [ 8 2 ( 2 a + ( 8 − 1 ) d − 4 2 ( 2 a + ( 4 − 1 ) d ] = 3 [ 8 x + 28 d − 4 a − 6 d ] = 6 ( 2 a + 11 d ) = 12 2 [ 2 a + ( 12 − 1 ) d ] = S 12 = L . H . S

Lucky Ahirwar 1 day, 21 hours ago

And

Sakshi Sharma 1 day, 19 hours ago

Given: HCF of two numbers 306 and 657 is 9 To find: LCM of number We know that, LCM x HCF = first number x second number LCM x 9 = 306 x 657 LCM=306x 6579 =22338

Ansh Gupta 2 days, 19 hours ago

Hey Nisha where is fourth question of 1.2 exercise. Are you joking.

Jagmohan Singh 3 days, 5 hours ago

There's something wrong in your question As SinA = 1/CosecA

Jagmohan Singh 3 days, 5 hours ago

Formula for finding the area of Circle is πr²

Jagmohan Singh 3 days, 5 hours ago

I can provide you the text solution But I'll recommend you understand it visually You can watch any video or I can send you my video link .

Naitik Rajput 4 days, 17 hours ago

1+sec/sec = sin²A/1-cos 1/sec+sec/sec = 1-cos²/1-cos Cos+1=(1-cos)(1+cos)/1-cos Cos +1 =1+cos LHS = RHS

Bhavya Jain 4 days, 3 hours ago

there was mistake

Laxmi Kumari 4 days, 21 hours ago

Hey I guess there's a mistake in your question

Priscilla Joy 5 days, 16 hours ago

1is to 2

Dev Barnwal 4 days, 21 hours ago

48

Aryan Birra 5 days, 19 hours ago

Chapter 8 and 9

Usha Subhash 5 days, 21 hours ago

47944413943

Priya Sharma 5 days, 22 hours ago

131109

Sankalp Dinesh 6 days, 3 hours ago

What is the polynomial and how it is raise to the power -1????
How CSA can be in cm3 and it's ratio instead of radius na??

Arun Dayma 6 days, 20 hours ago

42
Where is the figure??
Let p(x)=>4x²-4x+1=0 =>4x²-2x-2x+1=0 =>2x(2x-1)-1(2x-1) =>(2x-1) (2x-1) =>2x-1=0 or 2x-1=0 => x=1/2 or x=1/2 (Answer)

Gurjot Kaur 1 week ago

All rational and irrational numbers ( either positive or negative)

Abhishek Raghav 1 week, 1 day ago

Last year question paper of science

Divyangana Divyangana 1 week, 2 days ago

(2. Favourable outcome = 9 (4,4) (4,5) (4,6) (5,4) (5,5)(5,6) (6,4) (6,5) (6,6) Possible outcome = 36 POE = 9/36 POE = 1/4

Mahima Prajapati 1 week, 2 days ago

Favourable outcomes=(2,2)(2,3)(2,5)(3,2)(3,3)(3,5)(5,2)(5,3)(5,5) Possible outcomes=36 P(prime no.on both dice)=9/36=1/4

Gurjot Kaur 1 week ago

Mean =20 Median =40 By empirical relationship, 3 Median = Mode +2 Mean 3 (40) = Mode + 2(20) 120 = Mode + 40 Mode = 120 - 40 = 80 ## myCBSEguide

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