3.1 - 4.9 = - ( 4.9 - 3.1) = -1.8
-.2.4 + 8.7 = 8.7 - 2.4 = 6.3
-1/5 + 8/15 = 8/15 - 1/5 = 8/15 - 3/15 = 5/15 = 1/3
-3 1/3 - 1 1/6 = - (3 1/3 + 1 1/6 ) = - (3 2/6 + 1 1/6) = - 4 3/6 = - 4 1/2 = -4.5
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2.03 - x = 2.3
-x = 2.3 - 2.03
-x = 0.27
x = -0.27
<span>2 1/7 + y= - 2 1/7
</span>y = - 2 1/7 - 2 1/7
y = - (2 1/7 + 2 1/7)
y = - 4 2/7
А)
3/5 * (-5) * (-1/3) * (-1/15) * (-25) = 25/15 = 5/3 = 1 2/3,
Б)
-4/7 * (-28) * (-1/16) * (-8) = 2 * 4 = 8
364 = 2*2*7*13
495 = 3*3*5*11
у чисел 364 и 495 нет общих делителей, поэтому они являются взаимно простыми числами
7,2+5,2-4,8-9,3=12,4-14,1=-1,7
3) v(t)=x'(t) = 1+2*4t^(4-1) = 1+ 8t^3
v(2) = 1 + 8* 2^3 = 1 + 64 = 65 (м/с)
a(t)=v'(t) = 8*3*t^(3-1) = 24t^2
a(2) = 24*2^2 = 24*4 = 96 (м/с)^2
2) уравнение касательной:
y=f (x0) + f'(x0)*(x-x0)
f (x0)=f (2)=4-2*2^2 = 4 - 8 = - 4
f'(x) = -2*2*x^(2-1) = -4*x
f'(x0) = f'(2) = -4*2 = -8
y= -4 + (-8)*(x-2) = -4 -8x + 16 = -8x + 12