grade 6 number theory

Factorise using factor theorem. a) 2x 2 +x-3 b) 5x 2 +6x..

Question: The 50 t h term of an AP is 90 and 90 t h term is 50. Find the 140 t h term. Answer: If t n = m and t m = n then t m + n = 0 OR a = first term, d = common difference Subtracting (ii) from (i) 40d = -40 = 90 + 90d \ 140 t h term is zero..

Question: Answer: We know that the (r + 1) t h term of (x + a) n is given by ..

Rational and Irrational Numbers..

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Imaginary Number - Square root of a negative number is known as an imaginary number. a > 0 is an imaginary number. or A number whose square is negative is known as an imaginary number. . . . The symbol i, We write, Powers of ..

) It is not possible to find the exact value of an irrational number. (iii) All rational and irrational numbers can be marked on the number line. Write two possible irrational numbers between 2 and 3. Consider the squares of 2 and 3 and 5 and 6 lie ..

A = {3, 4, 5, 6}, B = {6, 4, 3, 5} A = B Elements in both sets need not be of same orde..

If A = {0, 7, 1, 2, 4, 11}, then n (A) = 6..

Two numbers are in the ratio 3:4. If 8 is added to the numbers, the ratio becomes 5:6. Find the numbers..