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For the equation 2x=tan(2tan^(-1)a)+w t ...

For the equation `2x=tan(2tan^(-1)a)+w t a n(tan^(-1)a+tan^(-1)a^3)` , which of the following is/are invalid? a.`"a"^2"x"+2"a"="x"` b. `"a"^2+2"a x"+1=0` c.`"a"!=0` d. `a!=-1,\ 1`

A

`a^(2)x+2a=x`

B

`a^(2)+2ax+1=0`

C

`a ne 0`

D

`a ne 1, -1 `

Text Solution

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The correct Answer is:
B, C
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