Question

Find the value of x , so that (-5)ⁿ⁺²+(-5)³=(-5)⁹​

Answer 1

Answer:

Wehave

5

x

+5

x−1

=750

5

x

(1+

5

1

)=750

5

x

(

5

6

)=750

5

x

=

6

750×5

5

x

=125×5

5

x

=5

4

∴x=4

Hence,thevalueofxis4.