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JEE PYQ: Binomial Theorem Question 27

Question 27 - 2020 (06 Sep Shift 1)

If ${p}$ denotes the fractional part of the number $p$, then $\left{\frac{3^{200}}{8}\right}$ is equal to:

(1) $\frac{5}{8}$ (2) $\frac{7}{8}$ (3) $\frac{3}{8}$ (4) $\frac{1}{8}$

Show Answer

Answer: (4)

Solution

$3^{200} = (1+8)^{100} = 1 + 8k$. Fractional part of $\frac{1+8k}{8} = \frac{1}{8}$.


Learning Progress: Step 27 of 55 in this series