JEE Main 2023 (Online) 6th April Morning Shift | Binomial Theorem Question 43 | Mathematics

If the ratio of the fifth term from the beginning to the fifth term from the end in the expansion of $$\left(\sqrt[4]{2}+\frac{1}{\sqrt[4]{3}}\right)^{\mathrm{n}}$$ is $$\sqrt{6}: 1$$, then the third term from the beginning is :

$$30 \sqrt{2}$$

$$60 \sqrt{3}$$

$$60 \sqrt{2}$$

$$30 \sqrt{3}$$

JEE Main 2023 (Online) 30th January Evening Shift

MCQ (Single Correct Answer)

-1

Let $x=(8 \sqrt{3}+13)^{13}$ and $y=(7 \sqrt{2}+9)^9$. If $[t]$ denotes the greatest integer $\leq t$, then :

$[x]$ is odd but $[y]$ is even

$[x]$ and $[y]$ are both odd

$[x]+[y]$ is even

$[x]$ is even but $[y]$ is odd

JEE Main 2023 (Online) 30th January Morning Shift

MCQ (Single Correct Answer)

-1

If the coefficient of $$x^{15}$$ in the expansion of $$\left(\mathrm{a} x^{3}+\frac{1}{\mathrm{~b} x^{1 / 3}}\right)^{15}$$ is equal to the coefficient of $$x^{-15}$$ in the expansion of $$\left(a x^{1 / 3}-\frac{1}{b x^{3}}\right)^{15}$$, where $$a$$ and $$b$$ are positive real numbers, then for each such ordered pair $$(\mathrm{a}, \mathrm{b})$$ :

a = 3b

ab = 1

ab = 3

a = b

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