Math, asked by nibha6792, 1 year ago

The sum of first 8 term of an AP is 100 and sum of first 19 terms is 551. Find AP.

Answers

Answered by ayushkumarwork6
3

Answer:

Step-by-step explanation:

HERE IS YOUR ANSWER;

Sn=n/2[2a+(n-1)d] Is the sum of the n terms.

NOW FOR THE EIGHTH TERM;

S8= 8/2[2a+(8-1)d]

S8=8a+28d=100

2a+7d=25 ......1)

Now,

Similar for 19th term;

s19=a+9d=29......2)

Now using elimination method;

a=2 and d=3

HOPE it helps

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Answered by danish1410
1

hi have a good day 5+3

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