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4.3 (A) Solve any two of the following.The first term of an A¡ P. s 5 and the common difference is 4. Completethe following activity and find the sum of the first 12 terms of the A. Pa=5, d = 4,5,2 = ?(1)12=6à |
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Answer» Sn = n/2[(2a + (n-1)d] S12 = 12/2[2*5 + (12-1)*4] S12 = 12/2[10 + 44] S12 = 6*54 S12 = 324 |
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