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Posted by Aadya Singh 4 years, 4 months ago
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Posted by Anuj Thakur 4 years, 5 months ago
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Yogita Ingle 4 years, 5 months ago
5×2+0×5+8×0+9+8
= 10+0×5+8×0+9+8
= 10 +8×0+9 + 8
= 10 + 9 + 8
= 19 + 8
= 27
Posted by Aditya Aditya 4 years, 5 months ago
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Posted by Jaya Jeevan 4 years, 5 months ago
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Gaurav Seth 4 years, 5 months ago
7, 77, 777, 7777 ….to n terms.
Sn=7+77+777+7777+……+to n terms
introducing 9
= (7/9) [9+99+999+……+ to n terms]
= (7/9) [(10-1) + (100-1) + (1000-1) +……...+ to n term]
= (7/9) [10+100+1000+……... n terms – (1+1+1+1+…… n terms)
= (7/9) [10+100+1000+………n terms –n]
Here a=10, r=10
= (7/9) [10(10n-1)/ (9) - n]
Posted by Arpita Chakravarty 4 years, 5 months ago
- 1 answers
Gaurav Seth 4 years, 5 months ago
QUESTION
Write the relation R = {(x, x3): x is a prime number less than 10} in roster form.
SOLUTION
R = {(x, x3): x is a prime number less than 10}
The prime numbers less than 10 are 2, 3, 5, and 7.
∴R = {(2, 8), (3, 27), (5, 125), (7, 343)}
Posted by A@Kash Kumar 4 years, 5 months ago
- 2 answers
Jaya Jeevan 4 years, 5 months ago
Gaurav Seth 4 years, 5 months ago
sin 100° + cos 100°
= sin100° + cos(90°+10°)
[cos 10° becomes sin 10°]
= sin100° + sin 10°
by the formula,
sin C + sin D = 2cos sin
= 2cos sin
= 2cos sin
= 2cos55° + sin45°
= 2cos55° + 1/√2
=√2.√2 cos55° .1/√2
= √2cos55°
Posted by A@Kash Kumar 4 years, 5 months ago
- 1 answers
Gaurav Seth 4 years, 5 months ago
A n s w e r : Maximum value is 1/2 and minimum value is -1/2.
EXPLANATION:
sin cos x = 1/2(2 sin x cos x)
= sin 2x/2
Hence, the Maximum value is 1/2 and minimum value is -1/2.
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Smita Mohapatra 4 years, 5 months ago
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? S. S. ? 4 years, 5 months ago
? S. S. ? 4 years, 5 months ago
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Krishnapriya Kumaran 4 years, 1 month ago
Manisha Dhibar 4 years, 5 months ago
Posted by Sourabh Choudhary 4 years, 5 months ago
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Posted by Aadya Singh 4 years, 5 months ago
- 4 answers
Gaurav Seth 4 years, 5 months ago
The answer is 26 [most probably]
First find x
3[x]+2 = 2[x+4] [given]
3x + 2 = 2x + 8
3x - 2x = 8 - 2
therefore x = 6
Now, y=3[x]+2 or y = 2[x+4]
Putting the value of x ,
we get y = 20
now x+y = 20 + 6
= 26
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Khushank Singh 4 years, 4 months ago
2Thank You