Ex.12.1 Q3 Algebraic Expressions Solution - NCERT Maths Class 7

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Question

Identify the numerical coefficients of terms (other than constants) in the following expressions:

(i) \(5 – 3t^2\)       

ii) \(1 + t + t^2 + t^3\)         

(iii) \(x + 2xy + 3y\)

(iv) \(100m + 1000n\)     

(v) \(– p^2q^2 + 7pq\)   

(vi) \(1.2a + 0.8b\)

(vii) \(3.14r^2\)         

(viii) \(2(l + b)\)                 

(ix) \(0.1y + 0.01y^2\)

 

Text Solution

 

S.No.

Expression

Term

Numerical Coefficient

(i)

\(5 - 3t^2\)

\(-3t^2\)

\(-3\)

(ii)

\(1 + t + t^2 + t^3\)

\(t, t^2 \) and \( t^3\)

\(1, 1 \) and \( 1\)

(iii)

\(x + 2xy + 3y\)

\(x , 2xy \) and \( 3y\)

\(1, 2 \) and \( 3\)

(iv)

\(100m + 1000n\)

\(100m \) and \( 1000n\)

\(100 \) and \( 1000\)

(v)

\(-p^2q^2 + 7pq\)

\(-p^2q^2 \) and \( 7pq\)

\(-1 \) and \( 7\)

(vi)

\(1.2 a + 0.8 b\)

\(1.2a \) and \( 0.8b\)

\(1.2 \) and \( 0.8\)

(vii)

\(3.14r^2\)

\(3.14r^2\)

\(3.14\)

(viii)

\(2(l + b)\)

\(2l \) and \( 2b\)

\(2 \) and \( 2\)

(ix)

\(0.1y + 0.01y^2\)

\(0.1y \) and \( 0.01 y^2\)

\(0.1 \) and \( 0.01\)

  
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