Posted inClass 9th math NCERT Coordinate Geometry chapter–3 class 9 Coordinate Geometry exercise 3.1 class-9
Algebraic Identities
(1) (a+b)2=a2+b2+2ab, (2) (a+b+c)2=a2+b2+c2+2ab+2bc+2ca, (3) (a+b)3=a3+b3+3ab(a+b), (4) a3+b3+c3–3abc=(a+b+c)(a2+b2+c2–ab–bc–ca), (5) a2–b2=(a+b)(a–b), (6) a3+b3=(a+b)(a2+b2–ab), (7) a3–b3=(a–b)(a2+b2+ab), (8) Constant quantities; (9) Variable quantities; (10) Constant term; (11) Equation
NCERT, Class 9, Number Systems, Chapter–1, Exercise-1.5 – Stepwise solution of each question
Q.1. Find: (i) (64)^(1/2), (ii) (32)^(1/5), (iii) (125)^(1/3); Q.2. Find: (i) (9)^(3/2), (ii) (32)^(2/5), (iii) (16)^(3/4), (iv) (125)^(-1/3); Q.3. Simplify: (i) ((2)^(2/3))×((2)^(1/5)), (ii) [(1/3)^3]^7, (iii) ((11^(1/2))/(11^(1/4)), (iv) ((7)^(1/2))×((8)^(1/2))
NCERT, Class 9, Number Systems, Chapter–1, Exercise-1.4 – Stepwise clear solution of each question
Q.1. Classify the following numbers as rational or irrational: (i) 2–√5, (ii) (3+√23) –√23, (iii) (2√7)/(7√7),(iv) 1/(√2), (v) 2π ; Q.2. Simplify each of the following expressions: (i) (3 +…
NCERT class 9th- Number System -Exercise 1.3- Proper explanation of each question
Q.1. Write the following in decimal form and say what kind of decimal expansion each has:(i) 36/100, (ii) 1/11, (iii) 41/8 , (iv) 3/13, (v) 2/11, (vi) 329/400 ; Q.2.…
Some facts about Decimal Numbers
(1)What are decimal numbers?, (2)Steps for converting a rational number into decimal form:, (3) Types of Decimal Numbers- (i) Non-repeating along with termination decimal numbers, (ii) Non-terminating along with repetition…