answer the above question with steps in proper way?
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This is the proof of your Question
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given 5 times 5th term = 8 times 8 th term
to prove 13th term = a + 12 d = 0
5a₅ = 8a₈
5 (a + 4d) = 8(a + 7d)
5a + 20d = 8a + 56d
5a - 8a = 56d - 20d
=> - 3a = 36d
=> -a = 12d
=> 12 d + a = 0 [ transpose - a to right and it becomes +a ]
a + 12d = 0 = 13th term hence proved
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