Question

11 класс. 360 номер. срочно!

Answer 1

lg122,5 = lg(1225:10) = lg( 35² :10) = lg35²-lg10= 2 lg35-1=2lg(5·7) - 1 = 2(lg5+lg7) - 1 = 2(a+b) - 1 = 2a + 2b - 1