1.

Identify the numerical coefficients of terms (other than constants) in the following expressions :(i) 5 – 3t2(ii) 1 + t + t2 + t3(iii) x + 2xy + 3y(iv) 100m + 1000n(v) -p2q2 + 7pq(vi) 1.2a + 0.8b(vii) 3.14 r2(viii) 2 (l + b)(ix) 0.1 y + 0.01 y2

Answer»

(i) 5 – 3t2

Term other than constant = -3/2

numerical co-efficient = -3

(ii) 1 + t + t2 + t3

Term other than constant = t, t2, t3

Numerical co-efficients = 1, 1, 1.

(iii) x + 2xy + 3y

Terms other than constants = x, 2xy + 3y

Numerical co-efficients = 1, 2, 3

(iv) 100m + 1000n

Terms other than constants = 100m, 1000n

Numerical co-efficients = 100, 1000.

(v) -p2q2 + 7pq

Terms other than constants = -p2 q2, 7 pq

Numerical co-efficients = -1, 7

(vi) 1.2a + 0.8b

Terms other than constants = 1.2a, 0.8b

Numerical co-efficients = 1.2, 0.8

(vii) 3.14 r2

Terms other than constants = 3.14r2

Numerical co-efficients = 3.14

(viii) 2 (l + b)

Terms other than constants = 2l, 2b

(∵ 2(l + b) = 2l + 2b)

Numerical co-efficients = 2, 2

(ix) 0.1 y + 0.01 y2

Terms other than constants = 0.1 y, 0.01 y2

Numerical co-efficients = 0.1, 0.01



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