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For all n > 0, the nth term of the arithmetic sequence {

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by Max@Math Revolution » Mon May 14, 2018 12:31 am

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B

C

D

E

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[GMAT math practice question]

For all n > 0, the nth term of the arithmetic sequence { An } may be found using the formula An=A1+(n-1)d. If A1=4 and A10= 94, what is the value of A11?

A. 101
B. 102
C. 103
D. 104
E. 105
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by Max@Math Revolution » Wed May 16, 2018 2:06 am
=>
We first need to find d. Now,
A10 = A1 + 9d
=> 94 = 4 + 9d
=> 9d = 90
=> d = 10.
So,
A11 = A1 + (11-1)d = 4 + 10*10 = 104.

Therefore, D is the answer.
Answer: D
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