English, asked by poojakumaresh26, 1 year ago

please answer this......

Attachments:

Answers

Answered by TPS
5
Question 1: Both are correct. you just took under root.

Q2.

[ {4}^{ - 7}   \div  {4}^{ - 10}]  \times  {4}^{ - 6} \\ \\ = [{4}^{ - 7-(-10)}  ]  \times  {4}^{ - 6} \\ \\= {4}^{-7+10}] \times 4^{-6}\\ \\ =4^3 \times 4^{-6}\\ \\ = 4^{3+(-6)}\\ \\ =4^{-3}\\ \\ = \frac{1}{ {4}^{3} }  \\  \\  =  \frac{1}{64}


Q3.


 {( \frac{1}{2} )}^{ - 2}  +  {( \frac{1}{3} )}^{ - 2}  +  {( \frac{1}{4} )}^{ - 2}  \\  \\ =   {2}^{2}  +  {3}^{2}  +  {4}^{2}  \\  \\  = 4 + 9 + 16 \\  \\  = 29

Similar questions