grade 7 number theory

Question: The first term of an AP is 73, common difference is -7. If the last term of the AP is -95, find the number of terms. Answer: Hence, the number of terms is 25..

Question: Find the first five terms of the sequence defined by t n = 6 - 4n. Which term of the sequence is -50? Answer: t n = 6 - 4n When n = 1, t 1 = 6 - 4(1) = 2 When n = 2, t 2 = 6 - 4(2) = -2 When n = 3, t 3 = 6 - 4(3) = -6 When n = 4, t 4 = 6 - 4(4) = -10 When n = 5, t 5 = 6..

Question: Answer: Expanding by binomial theorem, we get ..

2.793 represents 2 units, seven-tenths, nine-hundredths and three-thousandths or using fraction notation: (a) (b)..

Divide Rs.256 in the ratio 7:..

Determine whether x-2 is a factor of x 2 -7x+1..

Factorise x 2 - 7x + 1..

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

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 writ..

i) 1 + 4 + 7 + 10 + ... is a series in which first term is 1, second term is 4, third term is 7 and so on. ii) 3 - 9 + 27 - 81 + ... is also a series in which the first term is 3, second term is -9, third term is 27 and so ..