11th Standard Syllabus & Materials
11th Standard
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Published on: 13/05/2022
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Questions + Answers key
Take MCQ Maths Test1.
Find the square root of 9-4\(\sqrt{5}\)
2.
Find the value of \(\frac { 2-\sqrt { 3 } }{ \sqrt { 3 } } \) when \(\sqrt { 3 } \) = 1.732
3.
Given log216 = 4. Find log162
4.
Solve :x2+ 2|x| - 8 = 0
5.
A solution is to be kept between 68oF and 77oF. What is the range in temperature in degree Celsius (c) or Fahrenheit (F), conversion formula is given by \(F=\frac { 9 }{ 5 } \)C + 32?
1.
\(\sqrt{5}-\sqrt{4}\)
2.
Given \(\frac { 2-\sqrt { 3 } }{ \sqrt { 3 } } \)
The rationalising factor of the denominator is \(\sqrt { 3 } \)
\(\therefore \frac { 2-\sqrt { 3 } }{ \sqrt { 3 } } =\frac { 2-\sqrt { 3 } }{ \sqrt { 3 } } \times \frac { \sqrt { 3 } }{ \sqrt { 3 } } =\frac { 2\sqrt { 3 } -3 }{ \sqrt { 3 } } \)
= \(\frac { 2(1.732)-3 }{ 3 } =\frac { 3.464-3 }{ 3 } =\frac { 0.464 }{ 3 } \) = 0.154
3.
Given log216 = 4
Using \({ log }_{ b }^{ m }=\frac { { log }_{ a }^{ m } }{ { log }_{ b }^{ m } } \) we have
\({ log }_{ 16 }^{ 2 }=\frac { { log }_{ 2 }^{ 2 } }{ { log }_{ 2 }^{ 16 } } =\frac { 1 }{ { log }_{ 2 }^{ { 2 }^{ 4 } } } \) \([{ log }_{ a }^{ a }=1]\)
= \(\frac { 1 }{ 4{ log }_{ 2 }^{ 2 } } =\frac { 1 }{ 4 } \) [using power rule]
∴ \({ log }_{ 16 }^{ 2 }=\frac { 1 }{ 4 } \)
4.
Given x2+2|x| - 8 = 0
Here a = 1, b = 2, c = -8
∴ |x|2+2|x|-8 = 0 (∵ |x|2 = x2)
∴ |x| = \(\frac { -2\pm \sqrt { 4=32 } }{ 2 } \)
⇒ |x| = \(\frac { -2\pm \sqrt { 4+32 } }{ 2 } \)
\(\left[ \because x=\frac { { -b\pm \sqrt { b^{ 2 }-4ac } } }{ 2a } a=1,b=2,c=-8 \right] \)
⇒ |x| = \(\frac { -2\pm 6 }{ 2 } \)
|x| = -4,2
|x| = -4 is impossible
∴ |x| = 2 ⇒ x = ± 2
∴ The roots are 2, -2
5.
We have 68 < F < 77 ....(1)
Putting \(F=\frac { 9 }{ 5 } \) C +32 (1) becomes
\(68<\frac { 9 }{ 5 } C+32,<77\)
⇒ \(68-32<\frac { 9 }{ 5 } C<77-32\)
⇒ \(36<\frac { 9 }{ 5 } C<45\)
⇒\(\frac { 5 }{ 9 } \times 36\)
⇒ 20 < C < 25
Range of temperature is between 20oC and 25oC
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
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Economics

Physics

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