If 3n-27- then 3n-2 isA- 3B- 1 - 9C- 9D- None of these

The correct option is A 3 [ 3^n = 27 ⇒3^n 2.3^2 = 3^3; ⇒3^n 2 = 3^3/3^2 = 3. ] ...

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Quotient Law

If 3n=27, the...

Question

If 3 $^{n}$ = 27 , then 3 $^{n - 2}$ is

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1/9

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None of these

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If the sum of terms of an A.P is given by $S_{n} = 3 n + 2 n^{2}$ ,then the c.d of the A.P is

3^{n} = 27

3^{n - 2}

=

S_{n} = \sum_{k = 0}^{n} (- 1)^{K} .^{3 n} C_{k}, w h e r e n = 12, . . . . . .

Two cubes have their volumes in the ratio $1 : 27$ . The ratio of their surface areas is

(a) $1 : 3$

(b) $1 : 9$

(d) none of these

S_{n} = \sum_{k = 0}^{n} (- 1)^{K} .^{3 n} C_{k},

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