Question

Tn=5n-4 find s4
$tn = 5n - 4 \: find \: s4$

Answer 1

Hello !!



Tn = 5N - 4



T1 = 5 × 1 - 4 = 1



T2 = 5 × 2 - 4 = 6


T3 = 5 × 3 - 4 = 11




T4 = 5 × 4 - 4 = 16





Therefore,




S4 = ( T1+T2+T3+T4)



S4 = ( 1+6+11+16) = 34.



Hence,


S4 = 34.