[Math Revolution GMAT math practice question]
A = (2-3+4)^{11}, and B = (-2+3-4)^{11}. What is the value of 2^{A+B}?
A. 1/2048
B. 1/1024
C. 1
D. 1024
E. 2048
A = (2-3+4)^{11}, and B = (-2+3-4)^{11}. What is the value o
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- Max@Math Revolution
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A = (2-3+4)¹¹ = 3¹¹Max@Math Revolution wrote:[Math Revolution GMAT math practice question]
A = (2-3+4)^{11}, and B = (-2+3-4)^{11}. What is the value of 2^{A+B}?
A. 1/2048
B. 1/1024
C. 1
D. 1024
E. 2048
B = (-2+3-4)¹¹ = (-3)¹¹ = -3¹¹
Thus:
A+B = 3¹¹ - 3¹¹ = 0
2^(A+B) = 2� = 1.
The correct answer is C.
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- fskilnik@GMATH
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$$\left. \matrix{Max@Math Revolution wrote:[Math Revolution GMAT math practice question]
A = (2-3+4)^{11}, and B = (-2+3-4)^{11}. What is the value of 2^{A+B}?
A. 1/2048
B. 1/1024
C. 1
D. 1024
E. 2048
A = {3^{11}} \hfill \cr
B = {\left( { - 3} \right)^{11}} = - {3^{11}} = - A\,\,\, \hfill \cr} \right\}\,\,\,\,\, \Rightarrow \,\,\,\,\,? = {2^{A + \left( { - A} \right)}} = 1$$
We follow the notations and rationale taught in the GMATH method.
Regards,
Fabio.
Fabio Skilnik :: GMATH method creator ( Math for the GMAT)
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- Max@Math Revolution
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=>
A + B
= (2-3+4)^{11}+ (-2+3-4)^{11}
= 3^{11}+ (-3)^{11}
= 3^{11}- 3^{11}
= 0.
Therefore,
2^{A+B} = 2^0 = 1.
Therefore, the answer is C.
Answer: C
A + B
= (2-3+4)^{11}+ (-2+3-4)^{11}
= 3^{11}+ (-3)^{11}
= 3^{11}- 3^{11}
= 0.
Therefore,
2^{A+B} = 2^0 = 1.
Therefore, the answer is C.
Answer: C
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