Question

Given a12=37,d=3,find a and s12​

Answer 1

HERE'S YOUR ANSWER

Answer:

a=4 and s12=246

Step-by-step explanation:

Given a12=37

d=3

an=a+(n-1)d

a12=a+(12-1)3

37=a+(11)3

37=a+33

37-33=a

a=4

.'.value of a=4

sn=n/2[2a+(n-1)d]

s12=12/2[2(4)+(12-1)3]

=6[8+(11)3]

=6(8+33)

=6×41

=246

.'. the value of s12=246

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