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Ayeshaafzal
 3 years ago
A series is given by the formula
Tn=3+2nn^2
(b) Find n if the nth term is −252.
Ayeshaafzal
 3 years ago
A series is given by the formula Tn=3+2nn^2 (b) Find n if the nth term is −252.

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hartnn
 3 years ago
Best ResponseYou've already chosen the best response.0just plug in Tn = 252 then you get a quadratic equation in 'n' can you solve quadratic equations ?

manishsatywali
 3 years ago
Best ResponseYou've already chosen the best response.2dw:1358754263944:dw

manishsatywali
 3 years ago
Best ResponseYou've already chosen the best response.2n can't b negative so take positive sign n = 2+32/2 n=17

hartnn
 3 years ago
Best ResponseYou've already chosen the best response.0@Ayeshaafzal ,can you work that out by yourself ??

Ayeshaafzal
 3 years ago
Best ResponseYou've already chosen the best response.0yes but i was confuse about using 2n in quadratic i didnt know we didnt have to use n in it
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