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प्रश्न
For an A.P., if a = 7 and d = 2.5 then t12 = ?
विकल्प
37.5
34.5
28.2
44.5
उत्तर
34.5
Explanation:
Given: a = 7 and d = 2.5
t12 = a + (12 – 1)d
= 7 + (12 – 1) (2.5)
= 7 + (11) (2.5)
= 7 + 27.5
= 34.5
Thus, the value of t12 is 34.5.
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