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(-71)+(-9)(-81)+(-9)...

`(-71)+(-9)`____`(-81)+(-9)`

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[{(-1/3)^2}^(-2)]^(-1) = (a) 1/(81) (b) 1/9 (c) -1/(81) (d) -1/9

1/3,4/9,7/(27),(10)/(81),?,(16)/(729)

sqrt((25)/(81)-(1)/(9))=?(2)/(3)( b) (4)/(9)( c) (16)/(81) (d) (25)/(81)

The value of ((32)/(243))^(-4/5) is a.(4)/(9) b.(9)/(4) c.(16)/(81) d.(81)/(16)

Expand : (w-9)^(2) A. (w^(2)-9w+81) B. (w^(2)-9w+18) C. (w^(2)-18w+81) D. (w^(2)-18w-81)

sqrt(log_(3)(3x^(2))log_(9)(81x))=log_(9)x^(3)

The HCF of (2)/(3),(8)/(9),(64)/(81) and (10)/(27) is...

7 log (10)/(9) + 3 log""(81)/(80) =

3^((1)/(9)).9^((1)/(27)).27^((1)/(81)).81^((1)/(243))….oo=

Sum of n terms of the series 8 + 88 + 888 + .... equals (a) 8/81 [10^(n+1) - 9n - 10] (b) 8/81[10^n - 9n -10] (c) 8/81[10^(n+1) - 9n + 10] (d)none of these