2017
Mathematics
67ca00ce0c643c71d77dee1f
Simplify 3n−1 × (27n+1)/81n
A.
322n
B.
9
C.
3n
D.
3n + 1
Correct Answer: 9
Explanation
3n - 1 × (27n + 1/8nn) = 3n - 1 × (33(n + 1))/34n = 3(n−1+3n+3−4n) = 34n−4n−1+3 = 32 = 9
3n - 1 × (27n + 1/8nn) = 3n - 1 × (33(n + 1))/34n = 3(n−1+3n+3−4n) = 34n−4n−1+3 = 32 = 9THIS WEEK's
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