The intercepts on x-axis made by tangents to the curve, `y=int_0^x|t|dt , x in R ,` which are parallel to the line `y""=""2x` , are equal to (1) `+-2` (2) `+-3` (3) `+-4` (4) `+-1`

Explanation

`y = int_0^x |t| dt`

`dy/dx = |x|= 2`

`x +- 2`

when `x=2`

`y = int_0^2 |t|dt`

`= |t|^2/2 = 2`

when `x=-2`

`y= - int_0^-2 |t| dt`

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