JEE Mains · Maths · STD 11 - 8. sequence and series
If the sum and product of the first three term in an \(A.P\). are \(33\) and \(1155\), respectively, then a value of its \(11^{th}\) tern is
- A \(-25\)
- B \(25\)
- C \(-36\)
- D \(-35\)
Answer & Solution
Correct Answer
(A) \(-25\)
Step-by-step Solution
Detailed explanation
Let the three number in \(A.P.\) are \(a-d,a,a+d\) Given that \(a-d+a+a+d=33\) \( \Rightarrow a = 11\) and \(\left( {a - d} \right)\left( a \right)\left( {a + d} \right) = 1155\) \( \Rightarrow a\left( {{a^2}{d^2}} \right) = 1155\)…
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