3.Find :
i)$$2^{2/3} × 2^{1/5}$$
ii)$$(1/{3^{3}})^7$$
iii)$${11^{1/2}}/11^{1/4}$$
iv)$$7^{1/2} × 8^{1/2}$$

i)$$2^{2/3} × 2^{1/5}$$ = $$2^{2/3 + 1/5}$$ = $$2^{(10+3)/15}$$ = $$2^{13/15}$$
ii)$$(1/{3^{3}})^7$$ = $$1/{3^{3 × 7}}$$ = $$1/{3^{21}}$$ = $$3^{-21}$$
iii)$${11^{1/2}}/11^{1/4}$$ = $${11^{1/2}} × 11^{-1/4}$$ = $$11^{(2-1)/4}$$ = $$11^{1/4}$$
iv)$$7^{1/2} × 8^{1/2}$$ = $${7 × 8}^{1/2}$$ = $$56^{1/2}$$