Find the 25th term of the following A.P. 9, 4 , -1 , -6 , ...
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Answer:
129 is the correct answer
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Answer:
a = 9
d = 4 - 9 = - 5
25 th term = a + (25 - 1)d
= a + 24d
= 9 + 24(- 5)
= 9 - 120
= - 111
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