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CBSE Class 11-science Answered

PLEASE HELP
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Asked by Apoorva | 19 Sep, 2018, 10:04: AM
answered-by-expert Expert Answer
begin mathsize 16px style sum from straight n equals 1 to 11 of space left parenthesis 2 space plus thin space 3 to the power of straight k right parenthesis equals left parenthesis 2 space plus space 3 right parenthesis thin space plus thin space left parenthesis 2 space plus space 3 squared right parenthesis space plus space left parenthesis 2 space plus thin space 3 cubed right parenthesis space plus space............... plus thin space left parenthesis 2 space plus thin space 3 to the power of 11 right parenthesis equals left parenthesis 2 space plus space 2 space plus thin space 2...... space 11 space times right parenthesis space plus space left parenthesis 3 space plus thin space 3 squared thin space plus space 3 cubed space plus space.........3 to the power of 11 right parenthesis equals 2 space cross times space 11 space plus space 3 open parentheses fraction numerator 3 to the power of 11 minus 1 over denominator 3 minus 1 end fraction close parentheses equals 22 space plus space 3 over 2 open parentheses 3 to the power of 11 minus 1 close parentheses end style
Answered by Sneha shidid | 19 Sep, 2018, 10:59: AM

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CBSE 11-science - Maths
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PLEASE HELP
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Asked by Apoorva | 19 Sep, 2018, 10:04: AM
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15th 
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