If the coefficients of three consecutive terms in the expansion of (1+ 2x)^n (n∈N) are in the ratio 2:5:8,

If the coefficients of three consecutive terms in the expansion of (1+ 2x)ⁿ (n∈N) are in the ratio 2:5:8, then the middle term in the expansion of (1 + 2x)ⁿ is

(1) ⁸C₄(2x)⁴

(2) ⁵C₄(2x)⁴

(3) ¹⁰C₄(2x)⁴

(4) ⁶C₄(2x)⁴

If the coefficients of three consecutive terms in the expansion of (1+ 2x)^n (n∈N) are in the ratio 2:5:8,

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