[1points] To prove that for any real number a and b, Ifa^(2)+2ab+b^(2)+1 = 7 a) The directproof

[1points] To prove that for any real number a and b, "Ifa^(2)+2ab+b^(2)+1 <= 0, then a^(7)+b^(7) >= 7 a) The directproof b) The vacuous proof c) The trivial proof d) Thecontrapositive proof 14) [1 points] To prove that for an integer \( \mathrm{x} \) " \( \mathrm{x} \) is odd If \( 3 \mathrm{x}-15 \) is even". What kind of proof did you use? a) The direct proof b) The vacuous proof c) Th 0 answers