Question

if 1/6! - 1/7! = x/7! ,then the value of 'x' is ?

Answer 1

Answer:

1/6!-1/7!=x/7!

simple substract them in left hand side

(7!-6!)/6!7!=x/7!

so, 7! are vanish from both side

(7×6!-6!)/6!=x

• because, 7!=1×2×3×4×5×6×7
• =(1×2×3×4×5×6)×7

=6!×7

so, 6!(7-1)/6!=x

simply, x=6