1.

Given a12=37 d=3 find a and s12

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Answer:

Hey MATE! Here is ur answer...

Step-by-step EXPLANATION:

d = 3

a12 = 37

a + 11d = 37

a + 11×3 = 37

a + 33 = 37

a = 37 - 33

a = 4

S12 = n/2 × (a+an)

= 12/2 × (4+37)

= 6 × 41

= 246

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