Question

Do this in notebook

Ch:-4 Exponent and power

subject:- Maths


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Answer 1

Step-by-step explanation:

$\\ \red\bigstar\tt\: \dfrac{3³x5³x7²}{21³(7-2)³}$

$\\ \pink\bigstar\tt\: \dfrac{27x125x49}{125x21³}$

$\\ \pink\bigstar\tt\: \dfrac{27x49}{21x21x21}$

$\\ \pink\bigstar\tt\: \dfrac{9x3x7x7}{21x21x21}$

$\\ \pink\bigstar\tt\: \dfrac{9x7}{21x21}$

$\\ \pink\bigstar\tt\: \dfrac{3}{21}$

$\\ \pink\bigstar\tt\: \dfrac{1}{7}$

Correct answer =1/7=0.14

Answer 2

Step-by-step explanation:

$\frac{3 {}^{3} \times 5 {}^{3} \times 7 {}^{2} }{21 {}^{3} (7 - 2) {}^{3} } \\ = \frac{27 \times 125 \times 49}{21 \times 21 \times 21 \times 125} \\ = \frac{27 \times 49}{21 \times 21 \times 21 \ } \\ = \frac{1}{7} \\ = 0.142857$

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