1)125-4*(25-a)+48=125-100+4а+48=4а+73
при а=15, то 4*15+73=133
<span>2)510:х+24*(38-80:4)=510:х+432
при х=17, то 510:17+432=462</span>
Y'=[ cosx * 3x- sinx*3 ] /9x^2 = [ 3xcosx-3sinx] /9x^2 = [ xcosx-sinx ] / 3x^2
y'= [ -2sin2x *3x - cos2x*3 ] / 9x^2 = [ -6xsin2x-3cos2x ] /9x^2=
=[ -2xsin2x-cos2x]/3x^3
Ответ:
-84-13*(-5)=-19(: ну все вроде бы
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А) -о,25
б)4,9
в) 2,6
г) -1/3