Question

A=5,d=3 , Tn=50 find n & Sn

Answer 1

Answer:

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Step-by-step explanation:

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☺️☺️for find n ☺️☺️

✔️✔️Tn=a+(n-1)d

✅✅50=5+(n-1)3

✔️✔️45= 3n-3

✅✅48=3n

✔️✅n=48/3=> 16

☺️☺️for find sn☺️☺️

✔️✔️sn= 1/2n[a+(n-1)d]

✅✅put the value

✔️✔️sn= 1/2(16)[5+(16-1)3]

✅✅sn= 1/32[5+(15)3]

✔️✔️sn= 1/32(5+45)

✅✅sn= 1/32(50)

✔️✔️sn= 50/32======>. 25/16

✅✅n= 16 and sn= 25/16

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