Math, asked by captainrakeshpatil, 1 month ago

In an A.P. , a=6 and d=3; find the sum of the first 11 terms

Answers

Answered by sitad2102

0

Answer:

S11=231

Step-by-step explanation:

Answer is,

S11=11/2(2*6+(11-1)3)

=11/2(12+30)

=11(6+15)

=11*21

S11=231

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