Question

1a. Find a1 and r for a geometric sequence with the values given below an= 63,...

1a. Find a1 and r for a geometric sequence with the values given below

an= 63, n=3, Sn=91

a1= ?

r=?

b. find the sum of the terms in the arithmetic sequence below Sn

-10, -12, -14, -16,... -24

Sn=?

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