已知n为正整数,且x²ⁿ=5,求3(xⁿ)²+2(x³ⁿ)²+35的值
问题描述:
已知n为正整数,且x²ⁿ=5,求3(xⁿ)²+2(x³ⁿ)²+35的值
答
3(xⁿ)²+2(x³ⁿ)²+35
=3x²ⁿ+2(x²ⁿ)³+35
=3*5+2*5³+35
=15+250+35
=300