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Forwarded from Questions collection (Yogesh)
X^3-(a+b+c)x^2+(ab+bc+ca)x-abc=0
A+b+c=0
A^2+b^2+c^2=-2(ab+bc+ca)
=-2p>0
P<0. Only possible answers -1
Among options
abc=q
Forwarded from Yogesh
Areas √12*4*3*5=6*2√5=12√5
R=12√5/5=12/√5
Or
Tan(p/2)=✓4*3/12*5=1/√5
R=12*1/√5
Forwarded from Hard Question Series💪🏻 (Yogesh)
4p^2-48<0
-2√3<p<2√3
4q^2-48<=0
Same range
21p^2/2q^2 will be maximum when q minimum or p maximum
Maximum integer p=3
Minimum integer q=1
21(3)^2/2(1)=10.5=94.5
Forwarded from Yogesh
-11^45/180
-(11^3)^15*/180
-(71)^15/180
-(71^2)^7*71*/180
-71/180
180-71=109
71^2=5041
180*28=5040
Forwarded from Yogesh
Radius of the circles that touchs
Both circle 1/√r=√2. R=1/2
1/2:2. 1:4
1:5. 5----4
1--4/5. Area 16/25
Forwarded from Yogesh
323=17*19
16!+91/17 =16+91/17=5 reminder
16!+91/19= 9+91/19=5 reminder
17a+5=19b+5
a=0. B=0
Reminder 5
Forwarded from Deleted Account
323 = 17*19
16! + 91) mod 17 = 16 + 6 = 5

17! mod 19 = 1
17*16! mod 19 = (19k+1)
17 = 2k +1. k = 8
17*16! mod 19 = (19*8+1)= 153
16! mod 19 = 9

(16! + 91) mod 19 = 100 == 5

17a + 5 = 19b + 5
a=b=0

Remainder = 5 ✅
Forwarded from Yogesh
Cofficient of x^5 we can make x^5 by. X^2*x*x*x
Possible combinations
(1)(1)(1)(1)(2)=2
2+8-11+3=2
2x^5. So 2
Forwarded from Yogesh
Can be 1. If x^2-7x+11=1
X^2-7x+10=0. X=5,2
X^2-13x+42=0
X=6,7.
(-1)^something. Where something=even number
X^2-7x+12=0
X=4,3 f(x)=x^2-13x+42
At x=3. F(3)=12,. F(4)=6 both even
So total 6 solutions
Forwarded from Yogesh
5^40*2^50*3^100
(5*2)^40*2^10*3^100
40 zeroes
6^10*3^90=x
Logx=10log6+90log3
=10log2+100log3
=10*(.301)+100(.477)
=3.01+47.7
=50+++
Number of digits=51
Total 51+40=91
Forwarded from C
M1)

y² + 3x²(y² - 10) = 517

±10

(y² - 10)(3x² + 1) = 507

Factorise 507 and equate

x = 2, y = 7

23 ans


M2)

Using options

x + y + xy ± 1

(x + 1)(y + 1) - 1

Put options equal to this expression and check

(x + 1)(y + 1) - 1 = 23

(x + 1)(y + 1) = 24 = 3*8

x = 2, y = 7

Given equation satisfies

So 23 is ans.
Forwarded from John
Consider a 3 digit number having all three digit are different & number is divisible by 7. If we reverse the digit then this number is also divisible by 7. Then how many such types of number are possible, and find those numbers?

Ans- two, 952 & 861

Try this question
Forwarded from C
Number 100x + 10y + z

(100x + 10y + z) % 7 = 0

(100z + 10y + x) % 7 = 0

99(x - z) % 7 = 0

99 is not divisible by 7 , means (x - z) is divisible by 7.

Possible values of (x,z) = (1,8),(2,9),(8,1),(9,2)

Numbers : 168, 259, 861, 952
Forwarded from C
differentiate

3cosx - 3csc^2xcotx = 0

csc^3x = 1

x = pie/2

put

4
Forwarded from C
Arithmetic Mean >= Geometric Mean

here

(sinx + sinx + sinx + csc^3x)/4 >= (sinx*sinx*sinx*csc^3x)^1/4

(3sinx + csc^3x) >= 4

min. value = 4
Forwarded from C
(x^2 + y^2)/2 >= (xy)

48.5 >= xy

xy must be less than 48.5

so xy cant be 64
Forwarded from Nitish Kumar®
2&rh/2&r(h+r) = 1232/3080
5 = 3080
h/h+r = 1/2. 5
h/r= 2/3
22/7*2*6x^2= 1232
6x^2/7 = 28
X^2 = 14*14/6
Volume =
22/7*3x*3x*2x
22*42/root6*42/root6*28/root6

4312root6✅
Forwarded from Yogesh
[-3,3]. C can never be
If it is -3/2. 4x=120 x=30 doesn't satisfy a rejected
Now angle is 4 times there is a maximum possibllity it will be negative so only option d remain
Forwarded from C
6*200 + 12*199 + 18*198 + ......... + 1200*1

6(1*200 + 2*199 + 3*198 + ..... + 200*1)

formula = 1/6 * n(n + 1)(n + 2) where n = 200

put

n(n + 1)(n + 2)

200*201*202

8120400