Simplify : $$\frac{{343 \times 49}}{{216 \times 16 \times 81}} = ?$$
A. $$\frac{{{7^5}}}{{{6^7}}}$$
B. $$\frac{{{7^5}}}{{{6^8}}}$$
C. $$\frac{{{7^6}}}{{{6^7}}}$$
D. $$\frac{{{7^4}}}{{{6^8}}}$$
E. None of these
Answer: Option A
Solution(By Examveda Team)
$$\eqalign{ & \frac{{343 \times 49}}{{216 \times 16 \times 81}} \cr & = \frac{{{7^3} \times {7^2}}}{{{6^3} \times {2^4} \times {3^4}}} \cr & = \frac{{{7^{\left( {3 + 2} \right)}}}}{{{6^3} \times {{\left( {2 \times 3} \right)}^4}}} \cr & = \frac{{{7^5}}}{{{6^3} \times {6^4}}} \cr & = \frac{{{7^5}}}{{{6^{\left( {3 + 4} \right)}}}} \cr & = \frac{{{7^5}}}{{{6^7}}} \cr} $$Related Questions on Surds and Indices
A. $$\frac{1}{2}$$
B. 1
C. 2
D. $$\frac{7}{2}$$
Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to:
A. 1.45
B. 1.88
C. 2.9
D. 3.7
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