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dasha867
@dasha867
July 2022
1
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1.Найти производную функции:
1.f(x)= 6x/√(x²+1)
2.f(x)= ㏑сos²4x
3.f(x)= 4 sin^5 2x
2.Вычислить дифференциал функции
y= -㏑ctg2x
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dacrrienble
1) f ' (x)= [ (6x)'
- 6x * (
) ] / x^2+1
f ' (x)= [ 6
- 6x/
] / x^2+1
f'(x) = [ 6(x^2-x+1)] / (x^2+1)^3/2
2) f(x)=ln[ (1+cos8x) / 2]
f ' (x)= -4sin8x * 2/(1+cos8x) = -8sin8x/(1+cos8x)
3) f ' (x) = 4 * 2 * 5 cos^4(2x)=40cos^4(2x)
Дифференциал:
dy= 2/sin^2(2x) * 1/ctg(2x) dx
dy=2/sin2xcos2x dx
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Answers & Comments
f ' (x)= [ 6 - 6x/ ] / x^2+1
f'(x) = [ 6(x^2-x+1)] / (x^2+1)^3/2
2) f(x)=ln[ (1+cos8x) / 2]
f ' (x)= -4sin8x * 2/(1+cos8x) = -8sin8x/(1+cos8x)
3) f ' (x) = 4 * 2 * 5 cos^4(2x)=40cos^4(2x)
Дифференциал:
dy= 2/sin^2(2x) * 1/ctg(2x) dx
dy=2/sin2xcos2x dx