Question

16 x
2-4 X2
6. If 2n-7x5n-4 = 1250, find the value of n.
B. Mark against the correct answer in each of the following​

Answer 1

2

n−7

×5

n−4

=1250

2

n−7

×5

n−7

×5

3

=1250

⇒(2×5)

n−7

=

125

1250

⇒10

n−7

=10

1

⇒n−7=1

⇒n=7+1=8