Solution
Expression = $$((49)^\frac{3}{2}+(49)^\frac{-3}{2})$$
= $$((7^2)^{\frac{3}{2}}+(7^2)^{\frac{-3}{2}})$$
= $$7^3+7^{-3}$$
= $$343+\frac{1}{343}$$
= $$\frac{117650}{343}$$
=> Ans - (D)
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