Questions

[3 marks sum]

🎯

Test yourself on this topic

46 questions · timed · auto-graded

Question 23 Marks
Show that :
$\frac{x^{m+n} \times x^{n+l} \times x^{l+m}}{\left(x^m \times x^n \times x^l\right)^2}=1$.
Answer
$\left[\right.$ Hint : L.H.S $\left.=\frac{x^{m+n+n+l+l+m}}{x^{2 m} \times x^{2 n} \times x^{2 l}}=\frac{x^{2 m+2 n+2 l}}{x^{2 m+2 n+2 l}}=x^{2 m+2 n+2 l-2 m-2 n-2 l}=x^0\right]$
View full question & answer
Question 393 Marks
Evaluate :
$(64)^{2 / 3}+\sqrt[3]{125}+3^0+\frac{1}{2^{-5}}+(27)^{-2 / 3} \times\left(\frac{25}{9}\right)^{-1 / 2}$
Answer
$54 \frac{1}{15}$
View full question & answer
Question 423 Marks
Simplify :
$\frac{a^{7+2 n} \cdot\left(a^2\right)^{3 n+2}}{\left(a^4\right)^{2 n+3}}$.
Answer
$\frac{1}{a}$
View full question & answer
Question 433 Marks
Simplify :
$\frac{x^{2 n+3} \cdot x^{(2 n+1)(n+2)}}{\left(x^3\right)^{2 n+1} \cdot x^{n(2 n+1)}}$
Answer
$x^2$
View full question & answer
Question 463 Marks
Evaluate :
$\left(\frac{x^a}{x^b}\right)^{\frac{1}{a b}} \times\left(\frac{x^b}{x^c}\right)^{\frac{1}{b c}} \times\left(\frac{x^c}{x^a}\right)^{\frac{1}{c a}}$
Answer
1
View full question & answer
[3 marks sum] - MATHS STD 8 Questions - Vidyadip