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a-n-number-series-a-k-3-2-a-k-a-k-2-a-k-7-find-k-




Question Number 207930 by hardmath last updated on 30/May/24
a_n    number series  a_(k+3) ^2   +  a_k   =  a_(k+2)   +  a_(k+7)   find:   k = ?
$$\mathrm{a}_{\boldsymbol{\mathrm{n}}} \:\:\:\mathrm{number}\:\mathrm{series} \\ $$$$\mathrm{a}_{\boldsymbol{\mathrm{k}}+\mathrm{3}} ^{\mathrm{2}} \:\:+\:\:\mathrm{a}_{\boldsymbol{\mathrm{k}}} \:\:=\:\:\mathrm{a}_{\boldsymbol{\mathrm{k}}+\mathrm{2}} \:\:+\:\:\mathrm{a}_{\boldsymbol{\mathrm{k}}+\mathrm{7}} \\ $$$$\mathrm{find}:\:\:\:\boldsymbol{\mathrm{k}}\:=\:? \\ $$
Commented by mr W last updated on 31/May/24
what do you mean with “number series”?
$${what}\:{do}\:{you}\:{mean}\:{with}\:“{number}\:{series}''? \\ $$

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