CBSE Class 9 Answered
can you explain me Q.5 and Q.6 of exercise 6 .1 of rd sharma ?
Asked by swatipuspapatel | 07 Jun, 2020, 06:49: PM
Expert Answer
To classify the polynomials as polynomials in one-variable, two-veriable etc.
(i) x2 - xy + 7y2
This is a polynomial in two variables
(ii) x2 - 2tx + 7t2 - x + t
This is a polynomial in two variables
(iii) t3 - 3t2 + 4t - 5
This is a polynomial in one variable
(iv) xy + yz + zx
This is a polynomial in three variables
Identity polynomials in the following.
(i) f(x) = 4x3 - x2 - 3x + 7
This is a polynomial as the powers of x are non-negative and integer
(ii) g(x) = 2x3 - 3x2 + sqrt{x} - 1
This is not a polynomial as the power of x ais not an integer in the third term
(iii) p(x) = 2/3 x3 - 7/4 x2 + 9
This is a polynomial as the powers of x are non-negative and integer
(iv) q(x) = 2x2 - 3x + 4/x + 2
This is not a polynomial as the power of x is negative in the third term
(v) h(x) = x4 - x3/2 + x - 1
This is not a polynomial as the power of x is not an integer in the second term
(vi) f(x) = 2 + 3/x + 4x
This is not a polynomial as the power of x is negative in the second term
Answered by Renu Varma | 11 Jun, 2020, 10:45: AM
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