Q) The perimeter of a rectangular park is 120 m, and its length is 10 m more than its width. Find the dimensions of the park. Ans: Step 1: Let the width of the park be X meters. Since the length is 10 meters more than the width: Length = […]
Q) A shopkeeper buys an article for Rs. 500 and sells it for Rs. 650. Find the profit percentage. Ans: [Approach: % Profit is calculated by x 100″. Hence, if we calculate the profit, we can calculate % profit] Step 1: Profit = Selling Price – Cost Price = 650
Q) Solve the quadratic equation 2×2 – 3x – 5 = 0 using the quadratic formula. Ans: [Approach: we know that the in a quadratic formula, the value of x is calculated by: x = , where, b2 – 4 a c is the discriminant. Hence, if we calculate the value
Solve the quadratic equation 2x² – 3x – 5 = 0 using the quadratic formula. Read More »
Q) Find the value of ‘c’ for which the quadratic equation (c + 1) y 2 – 6 (c + 1) y + 3 (c + 9) = 0 has real and equal roots. [CBSE 2023 – Series 3- Set 3] Ans: For detailed solution to this question, please refer
Find the value of c for which the quadratic equation (c + 1) y2 – 6(c+1) y + 3(c+9)= 0 Read More »
Q). Prove that: sin θ/(cot θ + cosec θ) = 2 + sin θ /(cot θ – cosec θ) Ans. Let’s start from LHS: Step 1: LHS = = = = Step 2: We know that sin2 θ + cos2 θ = 1 ∴ sin2 θ = 1 – cos2 θ ∴ LHS = Step
Prove that: sin θ/(cot θ + cosec θ) = 2 + sin θ /(cot θ – cosec θ) Read More »
Q). Solve for x: , x ≠ 1, – , – 4 Ans: ∴ ∴ ∴ ∴ (8 x + 4) (x + 4) = 5 (x + 1)(5 x + 1) ∴ 8 x2 + 4 x + 32 x + 16 = 5 ( 5 x2 + 5 x + x + 1)
Solve for x: 1/ x + 1 + 3 / 5 x + 1 = 5 / x + 4, x ≠ 1, – 1/5, – 4 Read More »
Q). If the zeroes of the polynomial x2 + p x + q are double in values to the zeros of 2 x2 – 5 x – 3 Find the value of p and q. Ans: Step 1: Given polynomial equation 2 x2 – 5 x – 3 = 0 Comparing with standard polynomial, ax2
Q). If 𝛼 and β are zeroes of a polynomial x2 – 7 x + 10, then form a quadratic polynomial whose zeroes are 𝛼2 and 𝛽2 . Ans. For detailed solution to this question, please refer to the solution of a similar question – the link is given below: Click here for solution to similar question.
Q) In an A.P. of 50 terms, the sum of first 10 terms is 210 and the sum of last 15 terms is 2565. Find the A.P. Ans: We can find the AP, if we find its first term and common difference. Let’s consider the first terms of AP is “a” and the common difference
Q). Find the value of X, when in the A.P. given below 2 + 6 + 10 + …… + X = 1800 Ans: Step 1: In the given AP: a = 2, d = 4, Let’s consider there are n terms in this AP, Given that the sum of AP is 1800
Find the value of X, when in the A.P. given below 2 + 6 + 10 + …… + X = 1800 Read More »