if 5 times the 5th term of an ap is equal to 8 the times its its the term then show that its 13th term is zero
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Answer:
Explanation:
Let of the AP
first term= a
common difference=d
ATQ
5[a+(5-1)d]=8[a+(8-1)d]
5(a+4d)=8(a+7d)
5a + 20d = 8a + 56d
3a = 36d
a= -12d
Now 13th term
a+(13-1)d
=-12d+12d
=0
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