If the circles x^2+y^2=9 and x^2+y^2+2ax+2y+1=0 touch each other internally, then the value of a^3 is

MHT CET 2023 Mathematics question

If the circles and touch each other internally, then the value of is

Answer: (D)

Circle 1: centre , . Circle 2: centre , . Internal contact means (distance between centres) : . Squaring: . Taking

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Question ID VK-095368