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christinewilliams
 2 years ago
given the terms a1 = 5 and a 4= 14 of an arithmetic sequence what is a20
christinewilliams
 2 years ago
given the terms a1 = 5 and a 4= 14 of an arithmetic sequence what is a20

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ghazi
 2 years ago
Best ResponseYou've already chosen the best response.1\[T _{20}=a _{1}+(n1)d\] we need d

ghazi
 2 years ago
Best ResponseYou've already chosen the best response.1now, \[a _{4}=a _{1}+(n1)d, a _{4}=5+(41)d, 14=5+(3)d\] find d and you will have T 20 :)

christinewilliams
 2 years ago
Best ResponseYou've already chosen the best response.1wait..... it is multiple choice it could be 62, 65,171, 185

ghazi
 2 years ago
Best ResponseYou've already chosen the best response.1well calculate it :) your d=3 i guess then put d in the equation and find it :)

christinewilliams
 2 years ago
Best ResponseYou've already chosen the best response.1wait what?? so t20=5+(19)3

christinewilliams
 2 years ago
Best ResponseYou've already chosen the best response.1awesome thank you!!! can you help me with more!!! i am so behind in my math class!

ghazi
 2 years ago
Best ResponseYou've already chosen the best response.1keep posting :) don't follow up
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