Select the interval for which the function f is increasing, if f of x equals the integral from 1 to x of quantity 1 minus 2 times t squared close quantity dt period

(−0.707, 0.707)
(−infinity, −0.707)
(−infinity, 0.707)
(0.707, infinity)

Select the interval for which the function f is increasing if f of x equals the integral from 1 to x of quantity 1 minus 2 times t squared close quantity dt per class=