Question

3.2^n-4.2^n/2^n-2^n-1
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Answer 1

Answer:

Simplify 3.2n−4.2n2n−2n−1+{ap−qq√aq2−pq×a−2(p−q)}n3.2n−4.2n2n−2n−1+{ap−qaq2−pqq×a−2(p−q)}n

• A

-1

• B

1

• C

-2

• D

2

Solution

3.2n−4.2n2n−2n−1+{ap−qq√aq2−pq×a−2(p−q)}n3.2n−4.2n2n−2n−1+{ap−qaq2−pqq×a−2(p−q)}n

=2n(3−4)2n(1−2−1)+{ap−q(aq2/q−pq/q)×a−2(p−q)}n=2n(3−4)2n(1−2−1)+{ap−q(aq2/q−pq/q)×a−2(p−q)}n

=−11/2+{ap−q(aq−p)×a−2(p−q)}n=−11/2+{ap−q(aq−p)×a−2(p−q)}n

=−2+{a2(p−q)×a−2(p−q)}n=−2+{a2(p−q)×a−2(p−q)}n

=−2+{a0}n=−2+{a0}n

=−2+1=−2+1

=−1=−1

Answer (A) -1