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D. none of the above

Step-by-step explanation:

we have ,

using exponential formulaes....

now first option is x^(-4/2)=x^(-2)

nd, 2nd option is x^(-4)

and 3rd option is (-) x^(1/4)

none of em is matching!

so D is correct option!

✌️:)

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.