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What Expression Will Give the Sum of the First 11 5,20,80,320,1280,5,20,80,320,1280 , \ldots

Question 90

Short Answer

What expression will give the sum of the first 11 terms of the following sequence? 5,20,80,320,1280,5,20,80,320,1280 , \ldots .

A) 5(1411)14\frac { 5 \left( 1 - 4 ^ { 11 } \right) } { 1 - 4 }

В) 4(1510)15\frac { 4 \left( 1 - 5 ^ { 10 } \right) } { 1 - 5 }

C) 11(515)2\frac { 11 ( 5 - 15 ) } { 2 }

D) 4(1511)14\frac { 4 \left( 1 - 5 ^ { 11 } \right) } { 1 - 4 }

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