Question

Given:a12 =37,d=3,find a and s12​

Answer 1

Answer:

a=4 and S12=246

Step-by-step explanation:

a12=37 , d=3 , n=12

an= a+(n-1)d

a12=a+(12-1)3

37= a+11×3

37=a+33

a=37-33

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

S12 =246

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