Q. Let A₁, A₂, be two AM’s and G₁, G₂ be two GM’s between a and b,then (A₁ + A₂) / G₁G₂ is equal to _______

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Q. The series a,(a+b)/2, b is in _______

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Q. The series a, (ab)½, b is in _______

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Q. If A and G be the A.M and G.M between two positive number then the numbers are A + (A² – G²)½, A – (A² – G²)½.

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Q. If one geometric mean G and two airthmetic mean A₁, A₂ are inserted between two numbers, then (2A₁ – A₂) (2A₂ – A₁) is equal to _______

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Q. State whether the given statement is true or false.

AM ≤ GM.

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Q. If between two numbers which are root of given equation. x² – 18x + 16 = 0, a GM is inserted then the value of that GM is?

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Q. If a₁, a₂, a₃ are in airthemetic as well as geometric progression then which of the following is/are correct?

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Q. If a₁, a₂, a₃ are in GP then 1/a₁, 1/a₂, 1/a₃ are in ___________

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Q. If a₁, a₂, a₃…….. are in AP then if a₇ = 15, then the value of common difference that would make a₂ a₇ a₁₂ greatest is?

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Q. Let the sequence be 1×2, 3×2², 5×2³, 7×2⁴, 9×2⁵……… then this sequence is _________

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Q. Let the sequence be 1×2, 3×2², 5×2³, 7×2⁴, 9×2⁵……… then the next term of this AGP is given by _________

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Q. The sum of the first n natural numbers is given by _________

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Q. The sum of square of the first n natural numbers is given by _________

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Q. The sum of cubes of the first n natural numbers is given by _________

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Q. The series 1, 1, 1, 1, 1…….. is not an AGP.

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Q. If in an AGP the common ratio of GP is 1 then that sequence becomes an AP sequence.

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Q. The sequence 1, 1, 1, 1, 1…. is?

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Q. Which of the following is a Triangular number series?

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Q. Which of the following is a fibonacci series?

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