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Mathematics 18 Online
OpenStudy (anonymous):

Find the value of the 11th term of the series :

OpenStudy (anonymous):

\[\sum_{x=5}^{21}5(2)^x-3\]

OpenStudy (anonymous):

it 2 to the power of x-3

OpenStudy (anonymous):

its a geometric series where to get next term you multiply it by 2 1º term is 20 so sum is:\[20 (1-2^{11})/1-2\]

OpenStudy (anonymous):

so 40940 is the value of the 11th term?

OpenStudy (anonymous):

wait

OpenStudy (anonymous):

ya

OpenStudy (anonymous):

are u sure?

OpenStudy (anonymous):

sum of first 11 terms

OpenStudy (anonymous):

ups, sry, you whant the value....

OpenStudy (anonymous):

the question says Find the value of the 11th term of the series

OpenStudy (anonymous):

\[20*2^{10}\]

OpenStudy (anonymous):

its 2^x-3

OpenStudy (anonymous):

1024

OpenStudy (anonymous):

isint it 20480?

OpenStudy (anonymous):

ya its 20480 1024 = 2^10 20*2^10=20480

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