Question

please give me a answer

Answer 1

I) -1/4
ii) 64/729
iii) 513/64
iv)-8/81

Answer 2

= (-3/2)^3+(-3/2)^6
= (-27/8)+(-729/64) taking by lcm
= (-27×8)+(-729)/64
= -216+-(729)/64
=. -945/64 ans.