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  • If z = 10, find the value of z^3 (z - 10)

Q. 8.     (i) If z=10,  find the value of z^{3}-3(z-10)

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\\z^3 - 3( z - 10 ) \\= z^3 - 3z + 30 \\= 10^3 - 3 \times 10 + 30 \\= 1000 - 30 + 30 \\= 1000

If z = 10 the value of z3 - 3( z - 10 ) = 1000

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