Question

Andwe for Question 7

Answer 1

..........................,

Answer 2

Answer:

x=2

Step-by-step explanation:

25^(x-1)=5^(2x-1)-100

5^(2x-1)-25^(x-1)=100

5^(2x-1)-(5^2)^(x-1)=100

5^(2x-1)-5^2*(x-1)=100

5^(2x-1)-(5^(2x-2)=100

5^(2x-2)[ 5-1)=4*25

4*5^(2x-2)=4*5^2

5^(2x-2)=5^2

Now bases are same so power are equal

so 2x-2=2

2x=4

x=4/2=2

x=2