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Asked by aliencpr31 | 30 Jul, 2019, 11:56: AM
answered-by-expert Expert Answer
sum from k equals 0 to 12 of a subscript 4 k plus 1 end subscript equals 416
rightwards double arrow a subscript 1 plus a subscript 5 plus... plus a subscript 49 equals 416
rightwards double arrow a subscript 1 plus a subscript 1 plus 4 d plus a subscript 1 plus 8 d... plus a subscript 1 plus 48 d equals 416
rightwards double arrow 13 a subscript 1 plus 4 d open parentheses 6 cross times 13 close parentheses equals 416
rightwards double arrow a subscript 1 plus 24 d equals 32 space... space left parenthesis I right parenthesis
G i v e n space a subscript 9 plus a subscript 43 equals 66
rightwards double arrow a subscript 1 plus 25 d equals 33 space... space left parenthesis I I right parenthesis
S o l v i n g space left parenthesis I right parenthesis space a n d space left parenthesis I I right parenthesis comma space w e space g e t
a subscript 1 equals 8 space a n d space d equals 1
T h e r e f o r e comma
a subscript 1 squared plus a subscript 2 squared plus.. plus a subscript 17 squared equals 140 m
rightwards double arrow 8 squared plus 9 squared plus... plus 24 squared equals 140 m
rightwards double arrow 1 squared plus.. plus 7 squared plus 8 squared plus 9 squared plus... plus 24 squared minus open parentheses 1 squared plus.. plus 7 squared close parentheses equals 140 m
rightwards double arrow 4900 minus 140 equals 140 m
rightwards double arrow m equals 34
Answered by Renu Varma | 31 Jul, 2019, 10:28: AM
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