اردو

Home / Practice / Mathematical induction and binomial theorem / Worksheet

Practise online

Mathematical induction and binomial theorem

Class 11 · Mathematics · 8 questions

Name: ____________________   Date: ____________

  1. The number of terms in the expansion of (a + b)⁸ is:

    • A 10
    • B 8
    • C 9
    • D 16
  2. The coefficient of x² in (1 + x)⁵ is:

    • A 15
    • B 5
    • C 20
    • D 10
  3. The sum of the binomial coefficients in (1 + x)⁴ is:

    • A 8
    • B 4
    • C 16
    • D 32
  4. Mathematical induction is used to prove statements for:

    • A Real numbers
    • B Only even numbers
    • C All natural numbers
    • D Fractions
  5. The middle term of (a + b)⁶ is the:

    • A 4th
    • B 3rd
    • C 7th
    • D 5th
  6. The expansion of (1 + x)³ is:

    • A 1 + 3x + 3x² + x³
    • B 1 + 3x + x³
    • C 1 + 2x + x²
    • D 1 + x³
  7. The general term in (a + b)^n is:

    • A a^n + b^n
    • B nPr a b
    • C n a^r b
    • D nCr a^(n-r) b^r
  8. The coefficient of x³ in (1 + x)⁴ is:

    • A 4
    • B 1
    • C 3
    • D 6

Answer key

1. C, 2. D, 3. C, 4. C, 5. A, 6. A, 7. D, 8. A

  1. There are n + 1 terms.

  2. 5C2 = 10.

  3. Put x = 1: 2⁴ = 16.

  4. It proves a statement for every natural number.

  5. There are 7 terms, so the middle one is the 4th.

  6. The binomial coefficients are 1, 3, 3, 1.

  7. This is the (r + 1)th term.

  8. 4C3 = 4.