Question

77 (vi) given a = 2, d=8, S = 90, find n and a -62 S = 210 find n and d.​

Answer 1

Answer:

n=180

d = 0.34

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Answer 2

Answer:

Solution: Sn = 210 =n/2(8+62) ➪ 35n = 210 ➪ n = 210/35 =6 Now, 62 =8 + 5d ➪5d =62 -8 = 54 ➪d =54/5 =10.8 /37136/given-a-8-an-62-sn-210-find-n-and-d

Step-by-step explanation: