Question

If 2^7x-7 = 1 then x = ..................

A) 1 

B) 2 

C) 0 

D) 3

Answer 1

Correct option is (A) 1

\(2^{7x-7}\) = 1 \(=2^0\)

\(\Rightarrow\) 7x - 7 = 0

\(\Rightarrow\) \(x=\frac77=1\)

Answer 2

Correct option is    A) 1

Answer 3

If x value will 1

then;

2^7*1-7

=2^7-7

=2^0

( in exponent x^0=1)

the correct option is A