SOLUTION: SUM OF 8TH TERM OF A.P IS 160 WHILE THE SUM OF 20TH TERM IS 800.FIND THE 43TERM AND THE SUM OF THE 12TERM.

Question 946510: SUM OF 8TH TERM OF A.P IS 160 WHILE THE SUM OF 20TH TERM IS 800.FIND THE 43TERM AND THE SUM OF THE 12TERM.

Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

1.
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2.
Subtract eq.1 from eq. 2,

and

So then,

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