13. Consider the sequence given recursively by a = 1; a = 2an-1 +3;n21. Use backtracking to find a non-recursive formula (or a closed form) for the sequence. 14. Let X = {a,b,(a, b}, {a, {b}},{c}}. True or False? a. {a} EX b. {b} EX c. (c) EX d. {a,{b}} ex e. (a,b) CX

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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13. Consider the sequence given recursively by a = 1; a = 2an-1 +3;n21. Use
backtracking to find a non-recursive formula (or a closed form) for the sequence.
14. Let X = {a,b,(a, b}, {a, {b}},{c}}. True or False?
a. {a} EX
b. {b} EX
c. (c) EX
d. {a,{b}} ex
e. (a, b) CX
Transcribed Image Text:13. Consider the sequence given recursively by a = 1; a = 2an-1 +3;n21. Use backtracking to find a non-recursive formula (or a closed form) for the sequence. 14. Let X = {a,b,(a, b}, {a, {b}},{c}}. True or False? a. {a} EX b. {b} EX c. (c) EX d. {a,{b}} ex e. (a, b) CX
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