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【SAT数学题啊各种求解释和解答3,8,18……Inthesequenceabove,thefirsttermis3andeachtermafterthefirsttermistwicethesumoftheprecedingtermand1.Forexample,8=2(3+1).Whatisthevalueofthefirsttermofsequenceth】
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更新时间:2024-05-10 18:04:34
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SAT数学题啊各种求解释和解答

3,8,18……

Inthesequenceabove,thefirsttermis3andeachtermafterthefirsttermistwicethesumoftheprecedingtermand1.Forexample,8=2(3+1).Whatisthevalueofthefirsttermofsequencethatisgreaterthan100?

Togetthemostbenefitfromexercise,itisrecommendedthatapersonattainaheartrate,measuredinbeatsperminute,thatisbetween60percentand75percentofthevalueobtainedbysubtractingtheperson'sagefrom220.Whatisonepossibleheartrate,inbeatsperminute,recommendedfora20-year-oldjogger?

Whenacertaintwo-digitnumberismultipliedbyacertainone-digitnumber,theproductis891.Iftheone-digitnumberissubtractedfromtwo-digitnumber,whatistheresult?

a<b<c<d<e

p=abcde

Intheinequalityandtheequationabove,a,b,c,d,andearepositiveintegers.Whenjustoneoftheseintegersisincreasedby1andmultipliedbytheotherfour,thenewproductisn.Thedifference(n-p)is greatestwhenwhichofthefiveintegersisincreasedby1?

钱鲁峰回答:
  1)3,8,18……Inthesequenceabove,thefirsttermis3andeachtermafterthefirsttermistwicethesumoftheprecedingtermand1.Forexample,8=2(3+1).Whatisthevalueofthefirsttermofsequ...
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