Excercise 7.1 questions 1 to 10

class 10 exercise 8.4 question 4 part 1and2

Class 10 Exercise 10.2 Question 1 | CBSE Class 10 Ex -10.2 Q1 | NCERT | Class 10 Maths Chapter 10

Find the indicated terms in each of the sequences in Questions 7 to 10 whose nth term are : a_(n)=(-1)^(n-1)n^(3),a_(9)

Find the sum to indicated number of terms in each of the geometric progressions in Questions 7 to 10 : x^(3),x^(5),x^(7),..." n terms "(if x nepm1)

Find the decimal expansions of 10/3, 7/8 and 1/7 .

Find the decimal expansions of (10)/3,7/8 and 1/7 .

Coefficient of x^7 in (1 + x)^10 + x(1 + x)^9 + x^2 (1 + x)^8+………..+x^10 is

The rate constant for a reaction is 1.5 xx 10^(-7) at 50^(@) C and 4.5 xx 10^(7)s^(-1) at 100^(@) C . What is the value of activation energy?

Which of the following shows correct range of conductivity ? (i)Conductors : 10^4 to 10^7 ohm^(-1) m^(-1) (ii)insulators : 10^(-6) to 10^4 ohm^(-1) m^(-1) (iii)Semiconductors : 10^(-10) to 10^(-6) ohm^(-1) m^(-1)

The equation of the ellipse whose focus is (1, -1) , directrix is the line x-y-3=0 and eccentricity is 1/2 , is: (A) 7x^2 + 2xy + 7y^2 + 7 = 0 (B) 7x^2 + 2xy+7y^2 + 10x - 10y - 7 = 0 (C) 7x^2 + 2xy + 7y^2 - 10x + 10y + 7 = 0 (D) none of these