If $2^{x-1}+2^{x+1}$ = 320, then the value of x is
1). 6
2). 8
3). 5
4). 7
1. $\frac{256\times 256-144\times 144}{112}$ is equal to :
2. The value of $\sqrt{72+\sqrt{72+\sqrt{72+.....}}}$ is
4. When simplified equal to $(256)^{-\left(4^{-\frac{3}{2}}\right)}$ is
5. The greatest number among $2^{60}$,$3^{48}$,$4^{36}$, and $5^{24}$ is :
6. Given $\sqrt{2}$ =1.414. The value of $\sqrt{8}+2\sqrt{32}-3\sqrt{128}+4\sqrt{50}$ is
8. $\left[\left\{\left(-\frac{1}{2}\right)^{2}\right\}^{-2}\right]^{-1}$ is equal to :
9. The simplified form of $(16^{\frac{3}{2}}+16^{\frac{-3}{2}})$ is :