a)a₁=√72-√98+√32=6√2-7√2+4√2=10√2-7√2=3√2
a₂=√50-√162+√18-2√2=5√2-9√2+3√2-2√2=-3√2
mp=(a₁p₁+a₂p₂)/(p₁+p₂)=(2*3√2-4*3√2)/(2+4)=(6√2-12√2)/6=-6√2/6=-√2
b) a₁=√2+(-1)²¹-2/√2=(2-√2-2)/√2=-√2/√2=-1
a₂=√(3,5)⁻¹+1⁻⁵-(√3,5)⁻¹=(√3,5)⁻¹+1-(√3,5)⁻¹=1
mp=(a₁p₁+a₂p₂)/(p₁+p₂)=(-1*4+1*8)/(4+8)=4/12=1/3
