1) -2cosx * sinx = sin 2x
2) 2 sinx*cosx-2cosx*sinx=0
<span>1.
a</span>) <span>c</span> * <span>c</span>^15 : (<span>c</span>^7)^2= <span>c</span>^16/с^14= <span>c</span>^2
<span> </span><span>б</span><span>) -x^3y^2+ 2x^3y^2 - 3x^3y^2= x^3y^2(-1+2-3)
</span><span>в</span><span>) (2ab^3)^4 : (2a^2b)^2=2ab^12/2a^4b^2=a^-3*b^10
</span><span>г</span><span>)(n^8)^4 * n : (n^3)^11= n^32*n / n^33=n^33/n^33=n
2. 10^9 : (2^3)^3 * (5^3)^2=5^3
1) 10^9:2^9=5^9*2^9/2^9=5^9 (сократим 2^9)
2)5^9:5^6=5^3 (вычтем)
3. <span> (3/4)^8 * (4/3)^7<span> > </span> (-0.75)^0</span>
(3/4)^8*(4/3)^7=3^7*4^6
(-0.75)^0=1
5.<span> (25x^3)^2 * (5x^5)^3 : (125x^8)^2 = 25x^6*5x^15/125x^16=125x^21/125x^16=125x^5
</span>4 напишу позже если решу, в сообщении
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4
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9,9^2 = (10 - 0,1)^2 = 10^2 - 2*10*0,1 + 0,1^2 =
= 100 - 2 + 0,01 = 98 + 0,01 = 98,01