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[2 Mark Question Answer]

Question 542 Marks
Convert each of the to logarithmic form :
$3^{-3}=\frac{1}{27}$
Answer
$\log _3\left(\frac{1}{27}\right)=-3$
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Question 582 Marks
Convert each of the to exponential form:
$\log _5\left(\frac{1}{5}\right)^3=-1$
Answer
$5^{-1}=\frac{1}{5}$
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Question 632 Marks
Express each of as a single logarithm:
$2 \log _{10}\left(\frac{11}{13}\right)+\log _{10}\left(\frac{130}{77}\right)-\log _{10}\left(\frac{55}{91}\right)$
Answer
$\log _{10} 2$
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Question 642 Marks
Express each of as a single logarithm:
$\frac{1}{2} \log _{10} 9+\frac{1}{4} \log _{10} 81+2 \log _{10} 6-\log _{10} 12$
Answer
$\log _{10} 27$
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Question 652 Marks
Express each of as a single logarithm:
$2+\frac{1}{2} \log _{10} 9-2 \log _{10} 5$
Answer
$\log _{10} 12$
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Question 662 Marks
Express each of as a single logarithm:
$2 \log _{10} 5+2 \log _{10} 3-\log _{10} 2+1$
Answer
$\log _{10} 1125$
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Question 672 Marks
Express each of as a single logarithm:
$2 \log _{10} 8+\log _{10} 36-\log _{10}(1.5)-3 \log _{10} 2$
Answer
$\log _{10} 192$
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Question 682 Marks
Write the logarithmic equation for :
$x=a b \sqrt{\frac{a-b}{a+b}}$
Answer
$\log x=\log a+\log b+\frac{1}{2}[\log (a-b)-\log (a+b)]$
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Question 692 Marks
Write the logarithmic equation for :
$R =\sqrt{\frac{3 V}{\pi h}}$
Answer
$\log R=\frac{1}{2}(\log 3+\log V-\log \pi-\log h)$
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Question 702 Marks
If $\left(\log 7-\log 2+\log 16-2 \log 3-\log \frac{7}{45}\right)=1+\log n$, find the value of $n$.
[Hint: $R H S=\log 10+\log n=\log (10 n)$.
Answer
n=4
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Question 712 Marks
Solve for $x$ :
$\frac{\log x}{\log 5}=\frac{\log 9}{\log \left(\frac{1}{3}\right)}$
Answer
$x=\frac{1}{25}$
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Question 822 Marks
If $\log 2=0.3010$, find the value of $\left(\log \frac{75}{16}-2 \log \frac{5}{9}+\log \frac{32}{243}\right)$.
Answer
0.3010
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Question 832 Marks
Given $: \log 2=0.3010$ and $\log 3=0.4771$, find the value of : $\log \left(\frac{9}{4}\right)$
Answer
0.3522
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Question 872 Marks
Express $\log _{10}\left(\frac{\sqrt{p q^3}}{r^2 s}\right)$ in terms of $\log _{10} p, \log _{10} q, \log _{10} r$ and $\log _{10} s$.
Answer
$\frac{1}{2}\left(\log _{10} p+3 \log _{10} q\right)-2 \log _{10} r-\log _{10} s$
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Question 882 Marks
Express $\log _{10}\left(\frac{x^2 y^3}{z}\right)$ in terms of $\log _{10} x, \log _{10} y$ and $\log _{10} z$.
Answer
$2 \log _{10} x+3 \log _{10} y-\log _{10} z$
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Question 912 Marks
Evaluate:
$\log 5+16 \log \left(\frac{625}{6}\right)+12 \log \left(\frac{4}{375}\right)+7 \log \left(\frac{81}{1250}\right)$
Answer
1
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Question 922 Marks
Given (log _{10} x=a, log _{10} y=b),If $\log _{10} P =2 a-b$, express P in terms of $x$ and $y$.
Answer
$\frac{x^2}{y}$
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[2 Mark Question Answer] - Page 2 - MATHEMATICS STD 9 Questions - Vidyadip