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Question Number 199592 by hardmath last updated on 05/Nov/23

Commented by mr W last updated on 06/Nov/23

impossible! you can not get a sum of  270 !

impossible!youcannotgetasumof270!

Commented by mr W last updated on 05/Nov/23

the sequence is not clearly specified!  2, 7, 9, 16?, 25?, ....

thesequenceisnotclearlyspecified!2,7,9,16?,25?,....

Commented by hardmath last updated on 05/Nov/23

sorry dear professor, thank you  2 + 7 + 12 + ... + x = 270

sorrydearprofessor,thankyou2+7+12+...+x=270

Commented by hardmath last updated on 06/Nov/23

thank you dear professor

thankyoudearprofessor

Commented by hardmath last updated on 06/Nov/23

my dear professor,  how we write it is correct

mydearprofessor,howwewriteitiscorrect

Commented by mr W last updated on 06/Nov/23

for example:  2, 7, 9, 16, 25,...., x=273  2, 7, 12, 17,...., x=297

forexample:2,7,9,16,25,....,x=2732,7,12,17,....,x=297

Commented by hardmath last updated on 06/Nov/23

my dear professor, sorry  the first one is wrong, it does not form a  series

mydearprofessor,sorrythefirstoneiswrong,itdoesnotformaseries

Commented by mr W last updated on 06/Nov/23

it′s a fibonacci sequence.  2+7=9  7+9=16  9+16=25  ...  a_(n−2) +a_(n−1) =a_n

itsafibonaccisequence.2+7=97+9=169+16=25...an2+an1=an

Commented by hardmath last updated on 06/Nov/23

It is obvious, thank you my dear prafessor

Itisobvious,thankyoumydearprafessor

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