Question

please answer this question ​

Answer 1

an = a+(n-1)d ,(d=10-8=2

an = 8+(60-1)2

an = 8+59×2

an=8+118

an= 126 or last term=126

Sn = n/2+(2a+(n-1)d)

Sn =10/2+(2×8+(10-1)2

Sn = 5+(16+9×2)

Sn = 5+(16+18)

Sn = 5+34

Sn=39

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Answer 2

Answer:

Answer is in the image attached