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If (1+ax)^n = 1 + 8x + 24x^2 + … and a l...

If `(1+ax)^n = 1 + 8x + 24x^2 + …` and a line through `(a, n)` cuts the circle `x^2 + y^2 = 4` in `A and B`, then `PA.PB = `. (A) 4 (B) 16 (C) 8 (D) none of these

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