Binomial TheoremHard

Question

If the expansion of (3x + 2)-1/2 is valid in ascending powers of x, then x lies in the interval.

Options

A.(0, 2/3)
B.(3x + 2)-1/2 has infinite expansion when < 1
C.(-2/3, 2/3)
D.(-∞, -3/2) ∪ (3/2, ∞)

Solution

(3x + 2)-1/2 has infinite expansion when < 1
⇒ x ∈

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