Question

complete series 3, 8, ___,90,347​

Answer 1

Given :   A sequence 3,8,?,90,347

To Find :  Missing Number in Sequence

Solution:

3

3 + 4¹ + 1  = 3  + 4 + 1 = 8

8 + 4² + 1 = 8 + 16  + 1 = 25

25 + 4³ + 1 = 25 + 64 + 1 = 90

90 + 4⁴ + 1 = 90 + 256 + 1 = 347

Missing number is 25

Sequence is

Tₙ₊₁ = Tₙ  + 4ⁿ  + 1   where T₁ = 3

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