Math, asked by lovely14345, 10 months ago

a=7 and A13=35 find d and s13

Answers

Answered by umit43

0

Answer:

where is the latest b here

Answered by anand997875

1

Answer:

a=7

t13=35

t13=a+12d

35=7+12d

28=12d

d=28/12

d=7/3

s13=(13/2)*[2*7+(13-1)7/3]

=(13/2)*[14+28]

=(13*42)/2

=273

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