A1=5,d=2
a16=a1+15d
a16=5+15*2=5+30=35
180-(46+78)=56 градусов т.к сумма углов треугольника = 180 градусов
Ответ:56 градусов
f'(x)=3x-π/2+4sinx
f'(π/6)=3*π/6-π/2+4sinπ/6=π/2-π/2+4*1/2=2
<span>5a(a+b)-(3a-b)b+2b(b-a)= 5a^2+5ab-3ab+b^2+2b^2-2ab=5a^2+3b^2</span>
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