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If y=mx+5 is a tangent to x^(3)y^(3)=ax^...

If `y=mx+5` is a tangent to `x^(3)y^(3)=ax^(3)+by^(3)` at point (1, 2), then the value of a is equal to

A

`(9)/(5)`

B

`(16)/(5)`

C

`(9)/(4)`

D

`(18)/(7)`

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The correct Answer is:
B
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