Surds and Indices MCQ Question with Answer

Question No : 8
$\frac{1}{1 + x^{(b - a)} + x^{(c - a)}} +\frac{1}{1 + x^{(a - b)} + x^{(c - b)}}+\frac{1}{1 + x^{(b - c)} + x^{(a - c)}}= ?$

Question No : 9
$(25{)}^{7.5} \times (5{)}^{2.5} ÷ (125{)}^{1.5 }= 5?$

Question No : 10
$(256{)}^{0.16} \times (256{)}^{0.09 }= ?$