0,4x+0,5x=9
0,4x+0,5x = 0,9x
0,9x=9
x = 10
lim x⇒0 1-cos4x/2arcsin^2 2x=0,5lim(1-cos4x/(arcsin^2 2x)=0,5lim(1-cos4x)`/(arcsin^2 2x)`=0,5lim(√(1-x^2)sin4x/arcsinx2)=0,5lim(√(1-x^2)sin4x)`/(arcsinx2)`=
=0,5lim(2-8x^2)cos4x-2xsin4x))=0,5(lim(2-8x^2)limcos4x-lim2xsin4x)=0,5(2limcos4x-2limxsin4x)=0,5(-2limxlimsin4x+2limcos4x)=0,5*2limcos4x=0,5*2*1=1
Ответ:
Объяснение:
2log1/5 10 - log1/5 28 + 3/2log1/5 ∛49=log1/5 10² - log1/5 28 + log1/5 (7²)^(1/3)^(3/2)=log1/5 100 - log1/5 28 + log1/5 7=log1/5 100×7/28=log1/5 25=-2
log2 (8a)=log2 8+log2 a=3+14=17