1.
(a^5 + a^4 + a^3 + a^2 + a + 1) / (a^6 - 1) = ?
2. a+b = 1. prove that
a^3 + b^3 = 1 - 3*a*b.
3. prove that it's wrong:
5*a^2 + 3*b^2 + 20*a - 12*b + 34 = 0.
(a^5 + a^4 + a^3 + a^2 + a + 1) / (a^6 - 1) = ?
2. a+b = 1. prove that
a^3 + b^3 = 1 - 3*a*b.
3. prove that it's wrong:
5*a^2 + 3*b^2 + 20*a - 12*b + 34 = 0.
-
1. Use (a^6-1)/(a-1)=(a^5 + a^4 + a^3 + a^2 + a + 1)
2.Use (a+b)^3=a^3+3a^2b+3ab^2+b^3=(a^3+b^3+3ab…
3 I don't know what is meant here.
2.Use (a+b)^3=a^3+3a^2b+3ab^2+b^3=(a^3+b^3+3ab…
3 I don't know what is meant here.