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[4 marks sum]

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3 questions · timed · auto-graded

Question 14 Marks
$\left(\frac{3 p^2 q r^{-2}}{2 p^{-1} q^3}\right)^2 \div\left(2 p^3 r\right)^{-1}$
Answer
$\frac{9 p^9}{2 q^4 r^3}$
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Question 24 Marks
Find the value of x when :
$\left[\left\{\left(\frac{2}{5}\right)^2\right\}^4\right]^{x+2}=\left[\left\{\left(\frac{2}{5}\right)^{-2}\right\}^{(x-1)}\right]^{-3}$
Answer
$x=-11$
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Question 34 Marks
Find the value of x when :
$\left(\frac{-3}{11}\right)^{x+5} \div\left(\frac{-3}{11}\right)^{-2 x+3}=\left(\frac{-3}{11}\right)^{2 x-5} \times\left[\left(\frac{-3}{11}\right)^{-2}\right]^{(x+4)}$
Answer
$x=-5$
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[4 marks sum] - MATHS STD 8 Questions - Vidyadip