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प्रश्न
Write the 25th term of an A.P. 12,16,20,24, .......
बेरीज
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उत्तर
The given A.P. is 12, 16, 20, 24, ....
Here, a = 12 , d = t2 - t1 = 16 - 12 = 4
tn = a + (n-1)d
∴ t25 = 12 + (25 - 1)(4)
= 12 + 24(4)
= 12 +96
t25 = 108
The 25th term of the A.P. is 108.
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