Please answer the third question.

1.	Please answer the third question.
Answer» Step-by-step EXPLANATION: We have, an = 5-6N ⇒ a1 = 5 - 6 x 1 = -1 So, the given sequence is an A.P with FIRST term a = a1 = -1 and LAST term l = an = 5 - 6n Therefore the sum of n terms is given by: SN= n/2 (a+l)= n/2 (-1+5-6n)=2n-3n

Answer»

Step-by-step EXPLANATION:

We have, an = 5-6N ⇒ a1 = 5 - 6 x 1 = -1 So, the given sequence is an A.P with FIRST term a = a1 = -1 and LAST term l = an = 5 - 6n Therefore the sum of n terms is given by: SN= n/2 (a+l)= n/2 (-1+5-6n)=2n-3n

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