2sin(pi/10x)+1=0
sin(pi/10x)=-1/2
pi/10x=(-1)^k+1*pi/6+pik
x=(-1)^k+1*pi/6+10/pi+10k, k∈Z
=y^3-4y^2+16y-4y^2+16y-64=y^3-8y^2+32y-64
=x^6+x^4y^4+x^2y^8-x^4y^4-x^2y^8-y^12=x^6-y^12
1)a1=100-10*1^2=90
a2=100-10*2^2=60
a3=100-10*3^2=10
a4=100-10*4^2=-60
a5=100-10*5^2=-150
a6=100-10*6^2=-260
а во втором n в какой степени
<span>8x-6x = 7,5+1,5
2х= 9
х=9:2
х=4.5
4х-9х+6=46
-5х+6=46
-5х=46-6
-5х=40
х=-8
8х-6+х=9х-6
8х+х=9х
9х=9х
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