4 3/10 - (-2 5/8) = 43/10 + 21/8 = 172/40 + 105/40 = 277/40 = 6,925
X^8+y^8
надо было подобные подобрать вот и все
1) [(3(n+1)-1)/(5(n+1)+2)]/(3n-1)/(5n+2)=
=(3n+2)(5n+2)/(3n-1)(5n+7)
15n^2+16n+4-15n^2-16n+7=11>0
2) [(n+2)/2n+3)]/(n+1)/(2n+1)=
(n+2)*(2n+1)/[(2n+3)*(n+1)]
2n^2+5n+2-2n^2-3-5n=-1<0
3)
2sinx=<span>√2 [делим выражение на 2]
sinx=</span>√2/2
x=(-1)^n*arcsin(√2/2)+πn, n <span>∈ Z
</span>x=(-1)^n*π/4+πn, n ∈ Z