Math, asked by gurungsusmitaa32161, 6 months ago

in an A.P. if t10 =17 ,find S19

Answers

Answered by shenvsiddhi999

6

Answer:313

Step-by-step explanation:

a10=a+9d

17=a+9d

a=17-9d

s19=n/2[2a+18d]

=19/2[2(17-9d)+18d]

=19/2[34-18d+18d]

19/2x34

19x17

313

Answered by tishaoo6

0

Answer:

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