F ' (x)=2cos3x - 6xsin3x
F ' (π/6)=2cos(3 * π/6) + 6*(π/6) sin(3 * π/6) =
=2*0 + π * 1 = π
1) ( 7\13) ^ 0 = 1
2) 1 - 9^2 * 1\54 = 1 - 81\54 = 1 - 1.5 = ( - 0.5 )
(x-4)^2 + 2 • (4+x) • (4-x) + (x+4)^2 = (4+x)^2 + 2 • (16-x) + (4+x)^2 = 2 • (4+x)^2 + 2 • (16-x^2) = 2 • (4+x + 16-x^2) = 2 • (x • (4 - 16x)) = 2x • 4 • (1 - 4x) = 8x • (1 - 4x)
X/y * y/z = a * 1/a
xy/yz = a/a
x/z = 1
'y' сокращаются, а любое число, деленное на себя, равно 1.
Ответ: 1