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

InterviewSolution

1.

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

Answer»

=5n*52-6*5n*51/13*5n-2*5n*51

=5n(52-6*51)/5n(13-2*51)

=52-6*5/13-2*5

=25-30/13-10

=-5/3

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