If 1 + 9r2 + 81r4 = 256 and 1 + 3r + 9r2 = 32, then find the value of 1 - 3r + 9r2.
A. 8
B. 4
C. 16
D. 12
Answer: Option A
Solution(By Examveda Team)
1 + 9r2 + 81r4 = 2561 + 3r + 9r2 = 32
So, 1 - 3r + 9r2 $$ = \frac{{256}}{{32}} = 8$$
This Question Belongs to Arithmetic Ability >> Algebra
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