Find $7 x^{3} + x^{3} + x = ?$ ,if $x = 7$ .

Open in App

Solution

$P (1) 7 x^{3} + x^{3} + x$
substituting $x = 7$
$P (7) = 7 (7)^{3} + 7^{3} + 7$
$= (7 + 1) 7^{3} + 7$
$= 8 \times 343 + 7$
$= 2751$

Suggest Corrections

Similar questions

x^{2} + \frac{1}{x^{2}} = 7

x \neq 0

7 x^{3} + 8 x + \frac{7}{x^{3}} + \frac{8}{x} .

x^{2} + \frac{1}{x^{2}} = 7

x \neq 0

7 x^{3} + 8 x - \frac{7}{x^{3}} - \frac{8}{x}

7 x^{3} + x^{4} + x

x = 7

4 x^{4} + 7 x^{3} - 4 x^{2} - 7 x + p

x^{3} - x

x^{4} - x^{3} - 7 x^{3} + x + 6

Join BYJU'S Learning Program