Math, asked by kk1210V, 1 year ago

Sn-2(Sn-1)+S(3n-1) arthematic progress

Answers

Answered by sahbahasan

1

Sn-2(Sn-1)+S(3n-1)
Sn -2Sn+Sn+3Sn-S
5Sn-2Sn-S
3Sn-S

Answered by pravin3103

1

Sn-2(Sn-1)+S(3n-1) = Sn-2Sn+2+3Sn-S
= 2Sn-S+2

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