Let ff be a continuous function such that integral, from, 9, to, minus, 1, of, f, of, x, d, x, equals, minus, 1∫ 9 −1 ​ f(x)dx=−1 and integral, from, 9, to, 10, of, f, of, x, d, x, equals, 3, .∫ 9 10 ​ f(x)dx=3. What is the value of integral, from, minus, 1, to, 10, of, f, of, x, d, x, question mark∫ −1 10 ​ f(x)dx? ​