1.

\frac { 5 ^ { n + 2 } - 6 \times 5 ^ { n + 1 } } { 13 \times 5 ^ { n } - 2 \times 5 ^ { n + 1 } } Q

Answer»

=5ⁿ*5²-6*5ⁿ*5/13*5ⁿ-2*5ⁿ*5

=5ⁿ(5²-6*5)/5ⁿ(13-2*5)

=5²-6*5/13-2*5

=25-30/13-10

=-5/3

where does the 5to the power n goes in third step



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