Class 9 Exam > Class 9 Questions > a)2M – 1b)2M2+1c)2M2−1d)2M + 1Cor...
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- a)2M – 1
- b)2M2+1
- c)2M2−1
- d)2M + 1
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'...
If the mean of x and 1/2 is M. then the mean of
x² and 1/x² is
Mean of x and 1/x is M. So
( x +1/x)/2=M
Squaring on both sides,
(x +1/x)²/2²=M²
(x² + 1/x²+2*x*1/x)/4=M²
x²+1/x²+2=4 m²
x²+ 1/x²=4m²-2
Dividing by 2 on both sides,
(x²+1/x²)/2=(4m²-2)/2
= (x²+1/x²)/2 =2 *(2m²-1)/2=2m²-1
=Mean of x² and 1/x²=(2m²-1)
x² and 1/x² is
Mean of x and 1/x is M. So
( x +1/x)/2=M
Squaring on both sides,
(x +1/x)²/2²=M²
(x² + 1/x²+2*x*1/x)/4=M²
x²+1/x²+2=4 m²
x²+ 1/x²=4m²-2
Dividing by 2 on both sides,
(x²+1/x²)/2=(4m²-2)/2
= (x²+1/x²)/2 =2 *(2m²-1)/2=2m²-1
=Mean of x² and 1/x²=(2m²-1)
Most Upvoted Answer
a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'...
If the mean of x and 1/2 is M. then the mean of
x² and 1/x² is
Mean of x and 1/x is M. So
( x +1/x)/2=M
Squaring on both sides,
(x +1/x)²/2²=M²
(x² + 1/x²+2*x*1/x)/4=M²
x²+1/x²+2=4 m²
x²+ 1/x²=4m²-2
Dividing by 2 on both sides,
(x²+1/x²)/2=(4m²-2)/2
= (x²+1/x²)/2 =2 *(2m²-1)/2=2m²-1
=Mean of x² and 1/x²=(2m²-1)
x² and 1/x² is
Mean of x and 1/x is M. So
( x +1/x)/2=M
Squaring on both sides,
(x +1/x)²/2²=M²
(x² + 1/x²+2*x*1/x)/4=M²
x²+1/x²+2=4 m²
x²+ 1/x²=4m²-2
Dividing by 2 on both sides,
(x²+1/x²)/2=(4m²-2)/2
= (x²+1/x²)/2 =2 *(2m²-1)/2=2m²-1
=Mean of x² and 1/x²=(2m²-1)
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Community Answer
a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'...
If the mean of x and 1/2 is M. then the mean of
x² and 1/x² is
Mean of x and 1/x is M. So
( x +1/x)/2=M
Squaring on both sides,
(x +1/x)²/2²=M²
(x² + 1/x²+2*x*1/x)/4=M²
x²+1/x²+2=4 m²
x²+ 1/x²=4m²-2
Dividing by 2 on both sides,
(x²+1/x²)/2=(4m²-2)/2
= (x²+1/x²)/2 =2 *(2m²-1)/2=2m²-1
=Mean of x² and 1/x²=(2m²-1)
x² and 1/x² is
Mean of x and 1/x is M. So
( x +1/x)/2=M
Squaring on both sides,
(x +1/x)²/2²=M²
(x² + 1/x²+2*x*1/x)/4=M²
x²+1/x²+2=4 m²
x²+ 1/x²=4m²-2
Dividing by 2 on both sides,
(x²+1/x²)/2=(4m²-2)/2
= (x²+1/x²)/2 =2 *(2m²-1)/2=2m²-1
=Mean of x² and 1/x²=(2m²-1)
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a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer?
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a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer?.
a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer? for Class 9 2025 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer?.
Solutions for a)2M – 1b)2M2+1c)2M2−1d)2M + 1Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
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