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(iii) Given a_12 = 37, d = 3, find a and S_12

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asked Mar 13, 2018 in Mathematics by paayal (26,720 points) ● 4 ● 6 ● 54
edited Mar 15, 2018 by faiz

(iii) Given a12 = 37, d = 3, find a and S12.

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answered Mar 13, 2018 by sanjaydas (61,430 points) ● 5 ● 7 ● 7
selected Mar 15, 2018 by faiz
 
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Solution:37=a+3(12-1)= a+33

➪a=37-33=4

S12=12/2(4+37) =246

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