हल करना Given a = 7 , a_{13} = 35 find d and S_{13} | Equatix - Math Solver

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3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$a = 7 , a _ { 13 } = 35 d S _ { 13 }$$